Question
Question: Bullets of 0.03 kg mass each hit a plate at the rate of 200 bullets per second, with a velocity of 5...
Bullets of 0.03 kg mass each hit a plate at the rate of 200 bullets per second, with a velocity of 50 m/s and reflect back with a velocity of 30 ms–1. The average force acting on the plate in Newton is –
A
120
B
180
C
300
D
480
Answer
480
Explanation
Solution
P = m(v1 + v2) = 0.03 (50 + 30) = 2.4 Ns
F = 2.4 × 200 = 480 N