Question

A car of with a mass of 1,500 kg is moving with the velocity of 80 m per second uniformly and comes rest after 15 sec. Who can calculate its initial and final momentum?

Answer 1

To calculate the initial and final momentum of the car, we can use the formula for momentum:

Momentum = mass × velocity

1. Initial momentum: The initial momentum of the car is given by the product of its mass and initial velocity.

Initial momentum = mass × initial velocity

Given: Mass of the car (m) = 1,500 kg Initial velocity (v) = 80 m/s

Initial momentum = 1,500 kg × 80 m/s

2. Final momentum: The final momentum of the car is given by the product of its mass and final velocity. Since the car comes to rest, the final velocity is 0 m/s.

Final momentum = mass × final velocity

Given: Mass of the car (m) = 1,500 kg Final velocity (v) = 0 m/s

Final momentum = 1,500 kg × 0 m/s

Therefore, the initial momentum of the car is 120,000 kg·m/s (kilogram meters per second), and the final momentum is 0 kg·m/s.