Please help me out as soon as you can really need help. You can move the picture and see the whole problem.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.