2. Inertia refers to the A tendency of an object to accelerate as it moves downhill
B. change from potential energy to kinetic energy-
C. resistance of an object to gravitational force.
D. tendency of an object to maintain its state of motion unless acted upon by a force.

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

Why do astronauts in the space shuttle weigh less?