Determine the momentum of a 13,000kg semi driving at 30 m/s

390000

Explanation:

The momentum is huge. You wouldn't want this thing to hit you.

Momentum = m*v

m = 13000 kg

v = 30 m/s

Momentum = 13000 * 30

Momentum = 390000 kg m/s

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.