Question

Two people push a car for 3 seconds with a combined net force of 200N.
a)Calculate the impulse provided to the car.
b)If the car has a mass of 1200 kg,what will be the change in its velocity?

Answer 1

Answer:

a) 600 N s

b) 0.5 m/s

Explanation:

a) time, t = 3 s

Force, f = 200 N

impulse, I = f × t

= 200 N × 3 s

= 600 N s

b) impulse = change in momentum

600 N s = m × ( v - u )

600 N s = 1200 × ( v - 0 )

600 N s = 1200 × v

v = 600 ÷ 1200

= 0.5 m/s