A 1,500 kg car hits a boulder with a force of 500 N, and the collision takes 0.5

seconds. What is the magnitude of its impulse?

A. 75,000 kg-m/s

B. 50 kg-m/s

C. 250 kg-m/s

D. 750 kg-m/s

Answer: C.

250 kg-m/s

Explanation:

Given that the

Mass M = 1,500 kg

Force F = 500 N

Time t = 0.5 seconds

From Newton's second law of motion which state that the rate of change of momentum is proportional to the applied force.

F = mV/t

Ft = mV

Where ft = impulse: the product of time and applied force

Substitutes force and time into the formula

Ft = 500 * 0.5 = 250 Ns