One soccer player (A) is moving at 4 km/h when she kicks the ball while another soccer player (B) is moving at 8 km/h. What statement accurately compares their kinetic energy if they have the same mass?

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.)

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

What’s #16 asking and how do i solve it?