Answer:
The sum of the potential energy and kinetic energy of a body or system An example of mechanical energy is the power of a football flying through the air.
Explanation:
I took a test.
F = ma
20 N = (4 kg) a
a = 5 m/s²
Answer: A wave
Bc I know this
i dont really understand but when you accelerate you move faster. So i guess the skateboarder is moving fast forward