Question

A particle of mass m moving with a velocity v strikes a wall and rebounds back. If the magnitude of the velocity is unchanged, the magnitude of force exerted on the wall by the particle during the time of contact (t) will be -

• A. Zero
• B. mvt
• C. $\frac{2mv}{t}$
• D. $\frac{mv}{t}$

Answer 1

Answer: (C)

$\frac{2mv}{t}$

Answer 2

F = $\frac{dp}{dt} = \frac{2mv}{t}$