As a rock falls without air resistance, which of the following is true? . a. the kinetic energy of the rock transforms into potential energy.. b. all the potential energy becomes kinetic energy at the instant it is dropped.. c. part of the potential energy of the rock becomes kinetic energy during each part of the fall.. d. the potential energy of the rock has been transformed into thermal energy by the time the rock reaches the ground.

Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?

Explain the consequences of this addiction to the brain tissue

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp