Question

A ball of mass m moving with a velocity u rebounds from a wall. The collision is assumed to be elastic and the force of interaction between the ball and wall varies as shown in the figure. Then the value of F₀ is –

• A. mu/T
• B. 2mu/T
• C. 4mu/T
• D. mu/2T

Answer 1

Answer: (C)

4mu/T

Answer 2

Area of graph = Change in momentum

$\frac{1}{2}$ TF₀ = 2 um ̃ F₀ = $\frac{4mu}{T}$