Suppose you are pushing a car with a certain net force. if you then push it twice the net force, the car's acceleration a. becomes four times as much. b. becomes two times as much. c. stays the same. d. becomes half as much.

Agas is contained in a vertical, frictionless piston–cylinder device. the piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. a compressed spring above the piston exerts a force of 190 n on the piston. if the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.

Brutus, the dog, is pulling a bone to the left with a force of 20 n. lassie, another dog, is pulling a bone to the right with a force of 18n. what is the net force? a. b. c.

Why do astronauts in the space shuttle weigh less?