Question

3) A small plane with a mass of 1200 kg crashes into the ground with a velocity of 30 m/s . At one point prior to the crash, the plane was travelling at 15 m/s . How high above the ground was the plane when it was travelling 15 m/s ?

Answer 1

Given,

Mass of the plane, m=1200 kg

The final velocity when it crashes, v=30 m/s

The velocity before it crashes, u=15 m/s