Choose the best definition for velocity

1. How fast something is going

2. Speed in a certain direction

3. Which direction something is going

4. Something speeding up

What happens in the wires when the battery connections are reversed?

A 1 kg coconut falls vertically from a height of 10 meters. Use the principle of conservation of mechanical energy to calculate the energy of the coconut (1) in the tree before it falls, and (2) its speed when it hits the ground.

For which object is the force of gravity greatest: Earth, Moon, or Sun? Why?

During a particular time interval, the displacement of an object is equal to zero. Must the distance traveled by this object also equal to zero during this time interval? Group of answer choices

The atomic mass of an atom (in amu) is equal to

An apple drops from a tree and hits the ground in 1.5s what is its speed just before it hits the ground?

Sound travels slow in cold air. Why does the speed of sound depend on air temperature?

A tow truck pulls a 500 kg car so that the car accelerates 2 m/s2. What is the net force on the car? 250 N 498 N 1000 N 502 N

Which force keeps you near earths surface?

Name one process that requires a force in the human body.