A 25-N force accelerates a boy in
a wheelchair at 0.5 m/s2 What is
the mass of the boy and the
wheelchair?

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

The mass of the sun is 1.99×1030kg and its distance to the earth is 1.50×1011m. what is the gravitational force of the sun on the earth?