Question

A passenger is carried a bag of 5 kg on his shoulder standing railway station waiting for the train when the train is come he moves 5 metre towards the train calculate the work done by the passenger. Take g=10m/s

Answer 1

Answer:

Answer is " 250J " of the question

Answer 2

Mass of the bag = 5 kg

⇒ F (weight) = (5 kg)(10 m/s²) = 50 N

Now, displacement = 5 m

But, angle between force and displacement = 90°

We know, W = Fs cosθ

⇒ W = (50 N)(5 m) × cos90°

⇒ W = (50 N)(5 m) × 0 = 0 J.

{∵ cos90° = 0}

∴ She has done 0 work.