A50 kg car is pushed so that it speeds up from 20 m/s to 50 m/s in 3 seconds. what is the force acting on the car?
a
500 n
b
0.2 n
c
10 n

Which best represents the law of conservation of mass ?

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational

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.