acceleration is considered to describe an increase or positive change of speed or velocity But deceleation is considered to describe a decrease or negative change of speed or velocity
Acceleration is a vector quantity. When an object is said to have a negative acceleration, does it always mean that the object is slowing down? OTrue OFalse
from problem 2,suppose another boy, boy C pulls the heavy cabinet with 5N of force in the same direction with boy A
1. what will be the net foece on the cabinet?
2. will the cabinet move?
3. in what direction will the cabinet move?
Answer:
Searching in Google I found that in problem 2 were two boys pulling the heavy cabinet, a Boy A pulling in the left direction with 10 N of force, and a boy B pulling in the right direction with 5 N.
1. F = 10 N
2. Yes, it will move.
3. It will move to the left direction of the cabinet (same direction as the boys A and C).
Explanation:
Searching in Google I found that in problem 2 were two boys pulling the heavy cabinet, a Boy A pulling in the left direction with 10 N of force, and a boy B pulling in the right direction with 5 N.
1. Hence, if another boy (C) pull in the same direction as the boy A with 5 N of force, we have:
[tex] \Sigma F = F_{A} + F_{C} - F_{B} [/tex]
[tex] \Sigma F = 10 N + 5 N - 5 N = 10 N [/tex]
The net force on the cabinet is 10 N.
2. Yes, the cabinet will move. From point 1 we can deduce that the cabinet will move since the net force on the cabinet is different from zero (10 N).
3. The direction of the motion is the same as the Boys A and C, that is to say, to the left of the cabinet.
I hope it helps you!
The net force acting on an object, is the vector sum of all the forces acting on it
The correct values for the forces acting on the cabinet are;
1. The net force on the cabinet is 10 N
2. Yes, the cabinet will move
3. The cabinet will move in the direction of boy A and boy C
The reason the above values are correct are as follows:
Question: The possible missing part of the question is; In problem 2 boy A is pulling a heavy cabinet with [tex]F_A[/tex] = 10 N force, and boy B is pulling the same cabinet at the same time and in opposite direction with a force of [tex]F_B[/tex] = 5 N
The known parameter:
The force with which boy C pulls the heavy cabinet = 5 N
The direction in which boy C pulls the cabinet = The same direction as boy A
Question 1. The net force on the cabinet, [tex]F_{NET}[/tex] is given as follows;
Taking the direction of the force of boy A as the positive direction, we have;
[tex]\overset \longrightarrow {F_A}[/tex] = 10 N
[tex]\overset \longrightarrow {F_B}[/tex] = - 5 N
[tex]\overset \longrightarrow {F_C}[/tex] = 5 N
[tex]\overset \longrightarrow {F_{NET}}[/tex] = [tex]\overset \longrightarrow {F_A}[/tex] + [tex]\overset \longrightarrow {F_B}[/tex] + [tex]\overset \longrightarrow {F_C}[/tex]
[tex]\overset \longrightarrow {F_{NET}}[/tex] = 10 N + (-5 N) + 5 N = 10 N
The net force on the cabinet, [tex]\overset \longrightarrow {F_{NET}}[/tex] = 10 N
Question 2. Yes: Given that there is a net force acting on the cabinet, according to Newton's first law of motion, in the absence of friction force, the cabinet will move in the direction of the net force of 10 Newton
Question 3. The cabinet will move in the direction of the net fore
The direction of the net force is the direction boy A and boy C are pulling the cabinet
Therefore, the cabinet will move in the direction boy A and boy C are pulling the heavy cabinet
Learn more about addition of forces here:
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A motorcycle travels at a constant 20 m/s for 10 s. How far has it traveled?
d =200 m
Explanation:Hi there !
Velocity formula
v = d/t => d = v×t
d = distance
t = time
d = 20m/s×10s = 200 m
Good luck !
In a full sentence, explain the difference between static charge and static shock.
Answer:
The most significant difference between the static and current electricity is that in static electricity the charges are at rest and they are accumulating on the surface of the insulator. Whereas in current electricity the electrons are moving inside the conductor.
in determining the percentage purity of an impure NaCo3 for 4.2g of the impure was place in measuring cylinder to work up to 1000cm . the resultant solution is neutralize by 0.092m of 20.40cm3 Hcl in lab [ na=23,o= 16, c=12, h=1, cl=35-5]
hint: percentage purity =mass pure substance ×100
mass concentrate : impure substance??
[tex] {?}^{2} [/tex]
[tex] \binom{}{3} [/tex]
Answer:
C
Explanation:
I guess...
Sorry if it's wrong
An ant climbs to the very end of the second hand on a wall-mounted clock at exactly 9:15:00. The second hand is 13.5 cm long. When the time is exactly 9:17:30, (a) what distance did the ant travel? (b) What is the ant‟s displacement at this time? (c) What was the ant‟s average speed? (d) What is the ant‟s average velocity at this time? (e) At what time would the ant have traveled a distance of 100. M (give your answer to the nearest second).
Answer:
Explanation:
a) The second arm measures the minutes. The difference between 9:17:30 and 9:15:00 is 2 minutes 30 seconds. This means the second arm would have revolved 2.5 times.
The circumference = 2πr= 2π(13.5 cm) = 84.823 cm
Distance = 2.5 × 84.823 cm = 212 cm = 2.12 m
b) Displacement of an object is the shortest distance between the initial and final point. Since the second arm revolves 2 and half times, we use only the half times (a semicircle)
Displacement for semicircle = 2r = 2(13.5) = 27 cm
c) Average speed = distance / time
time = 2 minutes 30 seconds = 150 seconds
Average speed = 212 cm / 150 s = 1.41 cm/s
d) Average velocity = displacement / time = 27 cm / 150 s = 0.18 cm/s
e) number of revolutions = 100 m / circumference = 100 m / 0.848 m = 117.92
but 1 revolution = 1 minute
117.92 revolution = 117 minutes 55 seconds = 1 hour 57 minutes 55 seconds
Hence the time would be: 11:12:55
When does The mass of an object change
O A. it changes shape
O B. it loses a piece hs
O C. it gets hotter
O D. it gets cooler
Answer:
B. when it loses a piece
Explanation: it likely gets lighter
.
What change in the velocity's horizontal
component (v) and the range occurs
with each unit of time while getting
through the water?
Answer:
h the books
Explanation:
HELP me do this question PLEASE REPLY to you kripa and subscribe to you and ask for help me do this question PLEASE let them hate me and subscribe to the world 3rd birthday to you and I am sorry to hear that you are 4th and subscribe to the world of the books 4th century and subscribe to the world of the world of ❤❤
Most of the Earth's volcanoes occur
A.
near the center of tectonic plates.
B.
where there are no tectonic plates.
C.
along tectonic plate boundaries.
D.
before tectonic plates can form.
Answer:
A.
Explanation:
NEAR THE CENTER OF TECTONIC PLATES.
Answer: C. along tectonic plate boundaries
Explanation:
Right on Study Island 2021
some things are difficult for science to observe so ______ are built in order to study these phenomena
Answer:Describe how scientists study the natural world. Explain ... In this way, scientists gradually build an increasingly accurate and detailed ... Science rests on evidence and logic, so it deals only with things that can be observed. ... This is a drawback, because it may make the observations difficult to interpret.
Explanation:
Answer:
Models
Explanation:
To strike or hit something with great force
Answer:
To strike or crash into with resounding impact. To collide or strike with great force. Used to indicate the sound of a forceful blow or collision.
Answer:
To strike or crash into with resounding impact. To collide or strike with great force. Used to indicate the sound of a forceful blow or collision.
Explanation:
In a electrically natural atom of any element there are equal numbers of
Answer: Atoms are electrically neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged). If an atom gains or loses one or more electrons, it becomes an ion.
What is the speed of a 55.0 kg skydiver who has 7.81 x 104 J of kinetic energy?
Answer:
v=53.3m/s
Explanation:
Ek=1/2mv²
7.81×10⁴=1/2×55.0v²
v= the square root of 7.81×10⁴/0.5×55.0
v=53.3m/s
The speed of a 55.0 kg skydiver who has 7.81 x 104 J of kinetic energy is 53.29 m/s.
To find the speed, the given values are,
Mass m = 55 Kg
Kinetic Energy = 7.81x 10⁴ J
What is Speed?Speed is the rate of change of distance with time. It is a scalar quantity with magnitude both no direction.
Speed = Distance / Time m/s.
The unit is m/s or km/hr or mile/hr.
Distance covered is simply the length of the path traveled. The unit is m or km or miles.Time taken is the duration of an event. The unit is seconds or minutes or hour.Formula,
Kinetic energy = Ke = 1/2 mv²
When we solve for v,
v² = 2Ke/m
Substituting the given values,
v² = 2(7.81 x 10⁴) / 55
Simplifying,
v² = 15.62 x 10⁴ / 55
v² = 0.284 x 10⁴
v = 0.53291 x 10⁴
v = 53.29 m/s.
The speed of a 55.0 kg skydiver who has 7.81 x 104 J of kinetic energy is 53.29 m/s.
Learn more about speed,
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When conducting a polygraph test why is it important for the interviewer to establish a baseline on the interviewee?
Answer:
Because always when we do an experiment, we need something to compare.
For example, if we want to see how much change a given color paint when we add different amounts of white paint to it, we need to have at least one sample of pure color paint, so we can compare it whit the ones with mixed paints.
Well, the case of the polygraph is exactly the same, we need to have a baseline, so we the interviewer can see if for some questions there is a change in the line compared with the baseline.
Complete the statements by writing “image” or “no image”.
Becquerel expected to find (an)
when he developed the photographic plate that had Sun-exposed minerals on top of it.
Becquerel expect to find (an)
when he developed the photographic plate that had been in the closed drawer.
Answer:
1 Imadge 2 no
Explanation:
Answer: 1: image, 2: no image
Explanation:
1. What are three examples of forces?
Answer: Gravitational force.
Electric force.
Magnetic force.
Nuclear force.
Frictional force.
Explanation: I learned when I had science class.
HELP PLEASE!!!! 20 POINTS! If we increase the distance traveled over the same period of time, this will (2 points) decrease the speed
increase the speed
decrease the velocity
not affect speed or velocity
A train traveled at an average speed of 80 mph for 4.2 hours. Then, it traveled at an average speed of 60 mph for 1.5 hours. What was the total distance covered by the train?
Answer:
The answer is four hundred twenty six or 426
Answer:
426
Explanation:
A ___ is the unit of measurement for force.
Answer:
Newton (N)
Explanation:
A newton is the unit of measurement for force
accelerates uniformly from rest, reaching a speed of 36 meters per second in 6.0 seconds
Answer:
What's the question?
Explanation:
A car moves with a velocity of 20 m/s to east and the other with velocity of 15 m/s to west. If they move from the same point, how far will each of them travel in 2 minutes? Calculate the distance between them after 2 minutes
Answer:
4.2 km
Explanation:
CAR A(velocity =20m/s to East)
In 1s, it covers 20m.
In 120s(2min),it covers20*120m.=2400m=2.4 km
CAR B(velocity =15m/s to west)
In 1s, it covers 15m.
In 120s, it covers 15*120m.=1800m=1.8km
Now, distance between the two cars after 2 minutes =2.4 km+1.8 km=4.2km
2. Floyd Beattie set an unofficial speed record for a Floyd Beattie set an unofficial speed record for a unicycle in 1986. He rode the unicycle through a 200
m speed trap and accelerated at a constant rate along the speed trap, so that his initial speed was 9.78
m/s and his final speed was 10.22 m/s. What would the magnitude of his acceleration have been?
Answer:
0.022m/s²Explanation:
Given
v = 10.22m/s
u = 9.78m/s
S = 200m
Using the equation of motion'
v² = u² + 2aS
v is the final velocity
u is the initial velocity
a is the acceleration
S is the displacement
Substitute the given parameters into the formula:
10.22² = 9.78² + 2a(200)
104.4484 = 95.6484 + 400a
400a = 104.4484 -95.6484
400a = 8.8
a = 8.8/400
a = 0.022m/s²
Hence the magnitude of his acceleration would have been 0.022m/s²
A roundabout in a fairground requires an input power of 2.5 kW when operating at a constant angular velocity of 0.47 rad s–1 . (a) Show that the frictional torque in the system is about 5 kN m. (3) 1. (b) When the power is switched off, the roundabout decelerates uniformly because the
Answer:
Explanation:
Since the roundabout is rotating with uniform velocity ,
input power = frictional power
frictional power = 2.5 kW
frictional torque x angular velocity = 2.5 kW
frictional torque x .47 = 2.5 kW
frictional torque = 2.5 / .47 kN .m
= 5.32 kN . m
= 5 kN.m
b )
When power is switched off , it will decelerate because of frictional torque .
How RLC circuit is used?
Answer:
Explanation:i s an oscillating circuit consisting of a resistor, capacitor, and inductor connected in series. ... The voltage in the capacitor eventually causes the current flow to stop and then flow in the opposite direction. The result is an oscillation, or resonance.
What is is
optical instrument
Answer:
A simple microscope is an optical instrument we use for the magnification of small object to get a clear image or vision.It is a convex lens having a short focal length.
Answer:
Optical instruments is an instrument which is used in lens to make the image of an image
A boy pulls a wovon with a force or 6 Neast as another boy pushes it
with a force of 4 N east. What is the net force?
Answer:
The net force is 10 N.
Explanation:
A "net force" occurs when a particular object accelerates. It refers to the total number of forces that act on an object.
The boy pulling the cart and the other pushing it do their actions in the same direction. The force of pulling is 6 N while the force of pushing is 4 N. This means that the total force will not be cancelled.
To get the net force, add both forces since they are in the same direction (east).
Net force = 6 N + 4 N
Net force = 10 N (Newtons)
What is the acceleration due to gravity?
А
B
9.2
12.3
С
8.83
D
9.81
Solve the following exercises and discuss your results with your classmates and teacher.
1. The initial, final position and displacement of a particle are:
a) xi = 20m, xf = 6m How much did it move?
b) xi = 10km, Δx = –15km, what is the final position of the particle?
2. An athlete jogs from one end of a straight 80m track to the other:
a) What is your one-way displacement?
b) What is your return displacement? (taking negative direction back)
c) What is its displacement in the total trot?
d) What is your one-way distance?
e) What is your total trot distance?
3. In a circular skating lane whose radius is 96 m, the skater begins to move from point A
to point B which is at the opposite end. Consider the path to be a semicircle
a) What is its displacement?
b) What is the distance traveled?
Answer:
5379393 is the answer of the question
Explanation:
mark me as BRAINLIEST
) What is work? Write down the types of work.
Work
In physics work is said to be done when a force acting on a body displaces it through a certain distance. The work by a constant force is measured by the dot product of force will displacement.
i.e. W = F.S or W = F S cosq …(1)
where F = force and S = displacement
And q = angle between F and S.
Hope this helps! <3
How is a warm front different than a cold front? ANSWER NOW I ONLY HAVE 15 MINUTES LEFT! I will not give brainliest unless answered in time
Answer:
Warm fronts move more slowly and are less violent than cold fronts. They are associated with warm air moving over cold air and are more likely to produce large regions of light to moderate rain, drizzle or snow.
Explanation:
