Two soccer players kick the same 1-kg ball at the same time in opposite directions. one kicks with a force of 25n the other kicks with a force of 10n . what is the resulting acceleration of the ball in m/s^2

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?

What would be the radius of the earth if it had its actual mass but had the density of nuclei? express your answer to two significant figures and include the appropriate units.

You want to move a heavy box with mass 30.0 kg across a carpeted floor. you pull hard on one of the edges of the box at an angle 30∘ above the horizontal with a force of magnitude 240 n, causing the box to move horizontally. the force of friction between the moving box and the floor has magnitude 41.5 n . what is the box's acceleration just after it begins to move