Question

An object of mass 2 kg is sliding with a constant velocity of 4 m/s on a friction less horizontal table. The force required to keep the object moving with the same velocity is______

(please give ANSWER step by step )​



please guys give me the answer it's urgent.....

Answer 1

Answer:

The force to be applied 0 newton(N).

Explanation:

because acceleration of the body is downwards and the opposite force is to be applied upwards, given that velocity is constant.

i.e. v=const.=4 m/s

and mass=2Kg

therefore, acceleration(a)=d(velocity)/dt

                                         =d(const.)/dt

              acceleration(a) =0 m/(s)^2                                       ( d(const.)/dt=0)

if acceleration is zero then force is zero,

as Newton's second law gives,

Force(F)=mass X acceleration

              =2 X 0

Force(F)=0 N

Therefore, The required force to keep the body moving with same velocity is 0 N.

Happy to help you with this answer to your question.

Answer 2

Answer:

It is a force that opposes the motion of objects. ... Static friction can be defined as the force required to overcome friction when an object starts moving from a state of rest, while sliding friction is the force required to keep an object moving with the same speed, that is, once it has already started moving