Preston pushes a wheelbarrow weighing 500 n to the top of a 50.0-m ramp, inclined at 20.0° with the horizontal, and leaves it. tamara accidentally bumps the wheelbarrow. it slides back down the ramp, during which an 80.0-n frictional force acts on it over the 50.0 m. what is the wheelbarrow's kinetic energy at the bottom at of the ramp

Aforklift raises a 1,020 n crate 3.50 m up to a shelf. how much work is done by the forklift on the crate? the forklift does j of work on the crate.

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

Two positive charges are equal. which has more electric potential energy?