Unit Test — Unit test Answers

Which statement correctly describes gravity?

Scientists use a substance called Iodine-131 to treat cancer. As Iodine-131 undergoes radioactive decay and emits beta particles, it kill cancer cells.

Which refers to the force that one massive object exerts to attract another object?

A skydiver falls toward the ground at a constant velocity. Which statement best applies Newton’s laws of motion to explain the skydiver’s motion?

Jared is experimenting with a force that is attractive only and the weakest of the fundamental forces. He is experimenting with which force?

Which describes what a velocity/time graph would look like with no acceleration?

Which does a reference point provide?

Newton’s first law of motion was a giant leap forward in scientific thought during Newton’s time. Even today, the idea is sometimes difficult at first for people to understand.

The graph shows two runners participating in a race.

A graph labeled velocity versus time with horizontal axis time (seconds) and vertical axis velocity (meters per second). A blue line runs straight across at 2 units on the vertical axis for all horizontal axis values.

A toy car is placed at 0 on a number line.It moves 9 cm to the left, then 4 cm to the right, and then 6 cm to the left. What is the total distance the toy car traveled?

Hunter’s velocity was 4.5 m/s. At the end of his race, his velocity was the same. Which best describes his movement?

What is most often given a value of zero to describe an object’s position on a straight line?

Micah knows that a car had a change in velocity of 15 m/s. What does Micah need to determine acceleration.

An object has a mass of 5 kg. What force is needed to accelerate it at 6 m/s2? (Formula: F=ma)

Olivia places her pet frog on a line to observe the frog’s motion. The line is divided into sections that measure 1 centimeter each. The frog begins at 0, moves 18 centimeters forward, moves 6 centimeters backward, and then 12 centimeters backward.What is the frog’s displacement?

How is speed calculated?

Which force keeps molecules in a fluid together?

An object in projectile motion will follow which path?

When discussing Newton’s laws of motion, which terms do people most likely use when talking about Newton’s third law of motion?