Unit Test Answers

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?

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?

Holden is trying to determine the velocity of his race car. He went 20 meters east, turned around, and went 40 meters west. His car was 20 meters from the starting line. This took 5 seconds.What is the car’s average velocity?

Which refers to the sum of all the forces that act upon an object?

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.

Which would be represented by FN on a force diagram?

Which does a reference point provide?

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

The graph shows two runners participating in a race.

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

A bicycle has a momentum of 36 kg • m/s and a velocity of 4 m/s. What is the mass of the bicycle?

Anya knows the velocity of an object. What else does she need to know in order to find the object’s momentum?

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?

How is speed calculated?

is the displacement of an object during a specific unit of time.

Which example best represents balanced forces?

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

The chart lists the masses and velocities of four objects.

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

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