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For how long should a force of 100 N act on a body of 20 kg so that it acquires a velocity of 200 ms?
Wiki User
∙ 10y ago
u= 0 m/s
v= 200 m/s
m= 20 kg
F= 100 N
F= (mv - mu)/t
100 = (20*200 - 20*0)/t
100 = 4000/t
t= 4000/100
t= 40 s
hope it helps
cheers ^_^
Wiki User
∙ 10y ago
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What is a push or pull one body exerts on another body?
It is called force. Force is the push or pull exerted on a body that can change the shape or size, speed and velocity or other physical properties of that body.
Velocity changes when?
Velocity of any body changes due to external force being put in that body to make it stop or to make it move faster, for example the velocity of a car changes when you put on accelerator and it slows down when u put on brakes. therefore change in velocity is due to Acceleration and Retardation (Deceleration).
How do unbalanced forces affect an object's speed?
Newton's Laws of Motion tell us that the velocity of a body remains constant unless subject to a force. If there are more than one force acting, it will be the net force that causes any change in velocity. So in the case where the forces are balanced, nothing will change, but note you must be sure the forces are balanced in direction as well as magnitude. In fact what you have to do is evaluate the net force as a vector quantity. If the forces are in fact unbalanced this means there is a net force in a certain direction, and this will act on the body, in that direction. (Force = mass x acceleration)
Why is the centripetal force important?
It helps to tell your blood type.
How can a force affect moving object?
because the force pulls up the moving object and it stops When a force is applied to a body, the body gets acceleration or retardation. so the moving object may move faster or may stop. when there is no force, the moving object will move with a constant velocity.
What changes a body's velocity?
A force changes a body's velocity.
What happens to the velocity of a moving body if you change the direction in which the body is moving?
It depends how you changed the direction of the body. If the body is hit by an external force in the direction of motion, the velocity should increase. If the body is hit by an external force in the opposite direction of motion, velocity will decrease.
Starting from rest a 2 kg body acquires a speed of 8ms in 2 seconds the net force acting on the body is?
Starting from rest, a 2 kg body acquires a speed of 8 m/s in 2 seconds. The net force acting on the body is
What is the effect of gravity on velocity?
Gravity is a force and any force acting on a body changes its velocity in the direction of the force.
State the conditions needed for a body to have nonuniform velocity?
One condition, the net force acting on the body should not be zero.
What happens to the momentum of a body acted on by an external force?
If the force opposes the motion, it will reduce the velocity and the momentum of the body will decrease. If the force is in the direction of the motion, the velocity will increase and the momentum will increase.
Is the net force acting on a body is zero will the velocity be zero?
No, The velocity CHANGE will be zero
What is the difference between increasing velocity and uniform velocity?
Increasing velocity means that the body is accelerating and a force is acting on the body to produce the acceleration. Uniform velocity means that there is no acceleration or deceleration and so no force acts on the body. (Note that in practice we cannot achieve perpetual motion because of either the decelerating force of gravity or friction).
How velocity changes with time?
It changes if a force is applied to the body whose velocity is being measured.
What are the conditions for an object to stay at rest to keep moving at constant velocity or the move with increasing velocity?
A body is moving at constant velocity including zero at Equilibrium Condition, No change of energy or zero force. With force a body can accelerate, move with increasing velocity.
How is force a force?
Due to friction velocity of a body gets reduced, reduction in velocity causes change in velocity. This change in velocity leads to production of acceleration.(Because only acceleration can produce change in velocity either its direction or its magnitiude). And only a force can cause the acceleration hence friction is a force.
Type of force that can change the velocity of a body at rest or in motion?
Any force will cause change in velocity if it isn't canceled by an equal, opposite force.
