20 POINTS If the speed is tripled, the kinetic energy will .
A. be 9 times larger
B. triple
C. decrease by 1/3
D. double

A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?

The plum pudding model of the atom state that ?

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?