Which body is in equilibrium?
(1) a satellite moving around earth in a circular
orbit
(2) a cart rolling down a frictionless incline
(3) an apple falling freely toward the surface of
earth
(4) a block sliding at constant velocity across a
tabletop

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° 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.)

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished

True or false graphs must include scales that increase by the same amount