Answer: The statement that supports Newton's first law of motion is the one that says that planets can move at a varying speed due to forces exerted in space
Answer:
Yes
Explanation:
The shape will affect the friction and the way the skateboard moves.
ANSWER:
250 J
STEP-BY-STEP EXPLANATION:
F = 20N is required to stretch the spring by 4 meters
We know that the force is equal to:

We solve for k (spring constant):

The work done in stretching the spring is given by the following equation (in this case the stretch is 10 meters:

The work required is 250 joules.