Question

Please answer question no. 24
Also try to answer step wise.

Answer 1

Answer:

Work done = - 400 J

Option (2) - 400 J is correct.

Explanation:

Here, Initial velocity, v1 = 20 m/s

Final velocity, v2 = 0 m/s

Work done = 1/2 (mv^2) = 1/2× m × (delta v) ^2

Work done = 1/2 × 2 × (0 - 20) ^2

Work done = - 400 J