At what height is an object that has a mass of 50kg, if its gravitational

potential energy is 9800J?

A child goes down a slide with an initial height of 4m. What is his speed at the bottom of the slide?

If a pebble is being transported in a stream by rolling, how does the velocity of it compare to the velocity of the stream?

Explain how technology has affected peoples activits

An electron moving through an electric field experiences an acceleration of 5800 * 103 m/s 2. Find the magnitude of the electric force acting on the electron. The Coulomb constant is 8.98755 * 109 N · m2 / C 2, the fundamental charge is 1.

While ice skating, Tabitha pushes against the wall to stretch her leg. What is the reaction force?

In order for convection to occur, you must have

Explain Newton's First Law for the following. If you walk across the room holding a ball, when should you drop it to ensure that it lands on a target? Before, after or when you are directly on the target?

In what way are all forms of potential energy the same?

Enise is riding her bike and falls to the ground. During the collision, she hits both grass and cement. Which best explains why Denise had fewer injuries to the area of her body that hit the grass?

A rock is dropped into the Grand Canyon. It takes 18 seconds to hit the bottom. Calculate how deep the canyon is.