Question

A 1400 kg car moving +13.7 m/s makes an elastic collision with a 3200 kg truck, initially at rest. What is the velocity of the car after the collision?

(Unit = m/s)

Answer 1

-5.36m/s

Step-by-step explanation:

Answer 2

-13.7m/s

Step-by-step explanation:

If the car has a mass of 1400kg with a speed of +13.7m/s -> hits 3200kg@ rest and bounces with an elastic collision:

fm = -fm

Therefore, the speed the car will possess will be at a negative state.

= -13.7m/s