Question

While a car is stopped at a traffic light in a storm, raindrops strike the roof of the car. The area of the roof is 5.0 m2. Each raindrop has a mass of 3.7 ✕ 10−4 kg and speed of 2.5 m/s before impact and is at rest after the impact. If, on average at a given time, 150 raindrops strike each square meter, what is the impulse of the rain striking the car?

Answer 1

J = 0.693 N.s

Step-by-step explanation:

The impulse of one single drop is given by:

J1 = m*(Vf - Vo) where Vf = 0

`J1 = -9.25*10^(-4)N.s`

The magnitude of the total impulse will be:

Jt = J1 * 150 * 5

Jt = 0.693 N.s