You push really hard against a round rock, but you cannot make it roll. Which statement best explains why you cannot move the rock? Gravity pulls the rock toward the center of Earth.
The forces between you and the rock are balanced.
The force of your push is greater than the opposing force.
There is no friction to help you move the object.

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?