Question

can anyone solve this

Answer 1

Case-1

Here,the direction of the force acting on the block is perpendicular to the displacement.So, the work done by the force is 0.

Case-2

Here,the direction of the force acting on the block is in the direction of the displacement.So, the work done by the force will be positive.

Case-3

Here,the direction of the force acting on the block is opposite to the direction of the displacement.So, the work done by the force will be negative.

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