The same roller coaster car reaches the bottom of the track, 0 m from the ground. if no mechanical energy was lost to friction, what is the car kinetic energy?

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied. true or false

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.

Often called simply "velocity," this is the velocity of an object at a particular moment in time.