If 6 Joules of work are done on a 6kg box that is moved 3 meters, how much force is applied to the box? W= Fd: D=? F=? W?

The Earth is massive compared to most Earth-based objects, making acceleration due to Earth’s gravity approximately 9.8 m/s2. Using the equation, F = m X a and the value of 10 m/s2 for the acceleration of gravity, what is the force acting upon a 70 kg person?

On vacation in Pensacola a tourist floats lazily in the ocean with 85% of his body below the surface. The density of the ocean water is 1035 kg/m3. What is the tourist average density?

I should be able to answer this having taken the class, but I'm drawing a blank. A rocket takes off with constant acceleration. After 4 seconds a bolt falls off the rocket. The bolt hits the ground 6.3 seconds after falling off. What is the acceleration of the rocket? Help would be much...