7. Which statement is best supported by the diagram? (1 point) O Kinetic energy becomes potential energy between points Rand S.
O Maximum potential energy is at point P.
O Maximum potential energy is at point R.
O Potential energy becomes kinetic energy between points P and Q.

Identical marbles are released from the same height on each of the following four frictionless ramps . compare the speed of the marbles at the end of each ramp. explain your reasoning

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.)

What will a positive and a negative charge do if they are separated from each other?