Bill kicks a rock off the top of his apartment building. it strikes a window across the street 16 m away. the acceleration of gravity is 9.8 m/s 2 . if the window is 18 m below the position where bill contacted the rock, how long was it in the air

The roller coaster from problem #1 then tops a second hill at 15.0 m/s, how high is the second hill? 91.5 m 79.2 m 80.0 m 68.5 m

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car