Question

A ball of mass 0.2 kg moves with a velocity of 20 m/sec and it stops in 0.1 sec; then the force on the ball is

• A. 40 N
• B. 20 N
• C. 4 N
• D. 2 N

Answer 1

Answer: (A)

40 N

Answer 2

$F = ma$ $= \frac{m\Delta v}{\Delta t} = \frac{0.2 \times 20}{0.1} = 40\mspace{6mu} N$