Mrs G

If the zero level is a distance 2h/3 above the floor, what is the potential energy U of the block on the floor? Express your answer in terms of some or all the variables m, v, and h and any appropriate constants.

Using conservation of energy, find the speed v_b of the block at the bottom of the ramp. Express your answer in terms of some or all the variables m, v, and h and any appropriate constants. I would think it would be square root of v^2+2gh but its telling...

disregard the previous I did not include the first part This question is typical on some driver's license exams: A car moving at 50 km skids 15 m with locked brakes.How far will the car skid with locked brakes at 120 km/h?

when you dive from atop a tall flagpole into a swimming pool below. His potential energy at the top is 14000 J (relative to the surface of the pool).What is his kinetic energy when his potential energy reduces to 1000 J?

If you pull one end of the rope 1.0 m downward with a 50 N force, find the height you can lift a 150 N load.

In raising a 4000-N piano with a pulley system, the workers note that for every 1.6 m of rope pulled downward, the piano rises 0.22 m.Ideally, find the force that is required to lift the piano.

Emily holds a banana of mass m over the edge of a bridge of height h. She drops the banana and it falls to the river below. Use conservation of energy to find the speed of the banana just before hitting the water.Express your answer in terms of some or al...