Aball is dropped from a height of 1.0 m onto a hard concrete floor. it bounces back to a height 0.75 m. find what fraction of its mechanical energy was lost in the bounce.

0.25

0.75

0.0

1.00

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.)

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Which situation will produce the greatest change of momentum