Acurling rock with a mass of 20.0 kg slides down a sheet of ice at a speed of 6.00 m/s. the kinetic energy of the curling rock is how many joules?

The graph below represents the work done by a student while running up flights of stairs. determine the student's power output after 10 seconds: 1600 j/s 8000 j/s 160 j/s 800 j/s

Ben(55 kg) is standing on very slippery ice when junior(25kg) bumps into him. junior was moving at a speed of 8m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision .

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?