A baseball, 0.1 kg. is pitched at 45.0 m/s when is hit by the batter. The ball travels in the opposite direction it was thrown from with a speed of 65.0 m/s. What is the change in
momentum of the baseball?

What happens to light waves from a star as the star moves away from earth?

State the right hand rule of the direction of magnetic field in a conductor carrying current

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?