The statement "to every action there is an equal and opposite reaction" is
a. newton's third law of motion
b. newton's second law of motion
c. the law of conservation of momentum
d. newton's first law of motion

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

A1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. what is the magnitude of the friction force required to keep the car from sliding?