Practice question
Question
A 0.5g drop falls from 600m and hits the ground at 20m/s. What is the work done by the resistive force? (Take g\=10m/s2)
Explanation
Work W=F·d=Fd cosθ per NCERT Chapter 6. Positive if force along displacement. Using given F, d, θ, calculation gives -2.9 J. Work-energy theorem W=ΔK confirms. So option B is correct.