Lab: Motion — Unit test Answers

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

Which example best represents balanced forces?

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?

Jerome solves a problem using the law of conservation of momentum. What should Jerome always keep constant for each object after the objects collide and bounce apart?

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

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?

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

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

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?

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

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?

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

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.

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

Which does a reference point provide?

The resulting net force of an object is represented below. →10 NWhich most likely represent the forces acting on the object?

The chart lists the masses and velocities of four objects.