JEE Main Physics question

While waiting in a car at a stoplight, an 80 kg man and his car are suddenly accelerated to a speed of 5 ms⁻¹ as a result of a rear-end collision. If the time of impact is 0.4 s, find the average force on the man.

• (A)100 N
• (B)200 N
• (C)500 N
• (D)1000 NCorrect