Can the work by kinetic friction be positive?

Can the work by kinetic friction be positive?

Yes. Work is a directional quantity, so if the work done by friction occurs in the same direction that you have designated as the positive direction, the work done will be positive.

Is kinetic friction positive or negative?

Insight: Kinetic friction always does negative work because the force is always opposite to the direction of motion.

Is total work done by kinetic friction negative?

It is always applied against the motion. Since the direction of force and the displacement suffered by the body is in opposite direction, W=F.s or W=Fs cosθ becomes negative. And since they both are opposite (180 degree in this representation, cos θ= -1 and work becomes negative.

What is the work done by kinetic friction?

The work done by friction is the force of friction times the distance traveled times the cosine of the angle between the friction force and displacement; hence, this gives us a way of finding the distance traveled after the person stops pushing.

When can work done by friction be positive?

The work done by frictional force will be positive when the displacement of the body is in the direction of the force. This can be understood by an example. Consider there are two blocks stacked one over the other.

When work done on a particle is positive?

In work done is positive then kinetic energy increases. Since kinetic energy is directly proportional to the momentum therefore momentum also increases.

Is friction work negative?

The force of friction opposes the displacement (always), and does negative work.

When work done by a particle is positive?

When is the work – done by a force is positive and when is it negative? Assertion :- Work done is positive when force acts in the direction of displacement.

Can kinetic energy positive?

Kinetic energy must always be either zero or a positive value. While velocity can have a positive or negative value, velocity squared is always positive. Kinetic energy is not a vector.

When work done on a particle is positive then its kinetic energy?