A force of (19,89)N is acting on an object, what is the magnitude of the additional force (N) required to keep the object's motion uniform?
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To make the object go with uniform motion we will have to nullify that force which is acting on it and for that we need to exert a similar force in opp direction.
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Well, I know what it means, but I'm not sure how to get that.
Or do that rather.
Suppose a body is moving and a force of 10 N is acting on it towards east then in order to make its motion uniform we need to exert an additional force of 10 N in west direction.
Yes, that makes sense. So would we just take the force that they gave us and applied it in the opposite direction?
Yes, in addition to that force we apply same force in opp direction so that both the forces cancel each other and there will be no acceleration left and the body will keep moving with uniform velocity.
@Abhisar The answer isn't going to be (19,89). So I'm not sure what it's supposed to be.
Abhisar's answer is the right one (due to Newton's third law of dynamics), it is wrong only if the reference frame is non-inertial. Are you sure it is inertial? (it means that the measures are taken from a frame that has an acceleration different from 0).
Or maybe, is the object falling? In that case, it would also be acting gravity...