Determine the force of repulsion between two positively charged objects when separated by 4.9 x10-4 m. 9.60 x 10-22 N
5.22 x 10-35 N
4.70 x 10-25 N
1.07 x 10-31 N

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.