A60-g handball moving with a speed of strikes the wall at a 40° angle with the normal, and then bounces off with the same speed at the same angle with the normal. it is in contact with the wall for what is the average force exerted by the ball on the wall?

An object is dropped from a tower, 400 ft above the ground. the object's height above ground t seconds after the fall is s(t)equals400 minus 16 t squared. determine the velocity and acceleration of the object the moment it reaches the ground. the velocity of the object the moment it reaches the ground is nothing ft/s.

What do you think car designers do if the damage caused by a crash test is too severe?

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.