According to newton���s first law of motion, if you roll a ball in a straight line in an open field, what will happen to the ball?
a. the ball will continue on forever.
b. the ball will slow down.
c. the ball will not change its velocity.
d. the ball will speed up.

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?