1) There must be a force
2) There must be displacement
A star is a large ball of gas that emits energy produced by nuclear reactions in the star's interior. Much of this energy is emitted as electromagnetic radiation, including visible light. Light emitted by stars enables other objects in the universe to be seen by reflection.
Answer:
the force of the plow pulling backward on the tractor
Explanation:
Haven't taken physics but I would assume if her friend is standing in front of her that you would add up the speeds and get 30 km/hr.
Steel is more dense because it’s heavy while water is light