PLEASE HELP M. A girl throws a ball 15 m into the air. The ball has the maximum potential energy at a height of a. O m.
b. 5 m.
c. 10 m.
d. 15 m.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .