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Forces and Motion Practice Tests

These Grade 7 Science practice tests build understanding of forces, net force, balanced and unbalanced forces, speed, velocity, acceleration, friction, gravity, mass, weight, and Newton's laws.

Skills covered

  • Describing motion with position, reference points, speed, velocity, and acceleration
  • Comparing balanced and unbalanced forces and determining net force direction
  • Explaining friction, gravity, air resistance, and normal force
  • Applying Newton's first, second, and third laws to everyday situations
  • Interpreting simple force, motion, and measurement scenarios

How to use these practice tests

For each question, identify the object and the forces acting on it. Then compare force directions and sizes before deciding whether the object remains at rest, moves at constant velocity, or accelerates.

For more Grade 7 Science practice, return to the Grade 7 Science category.

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Grade 7 Forces and Motion Practice Tests

Practice Grade 7 Science forces and motion questions about net force, speed, acceleration, friction, gravity, mass, weight, and Newton laws.

Choose the best answer for each question. Review the explanation after submitting your answers.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

A soccer ball at rest is kicked and moves forward. What caused the change?

Please select an answer first.

Correct answer: A

The correct answer is An unbalanced force from the kick acted on the ball..

  1. Identify the motion idea: Determine whether the question asks about force, motion, speed, acceleration, mass, weight, or an interaction.
  2. Connect the evidence: The kick creates a net force that changes the ball's velocity from rest to motion.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

The kick creates a net force that changes the ball's velocity from rest to motion.

2. QuestionMultiple choice

A sled is pulled right with 50 newtons while friction pulls left with 20 newtons. What is the net force?

Please select an answer first.

Correct answer: B

The correct answer is 30 newtons to the right.

  1. Identify the motion idea: Determine whether the question asks about force, motion, speed, acceleration, mass, weight, or an interaction.
  2. Connect the evidence: Opposite forces subtract: 50 newtons right minus 20 newtons left gives 30 newtons right.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

Opposite forces subtract: 50 newtons right minus 20 newtons left gives 30 newtons right.

3. QuestionMultiple choice

A box has 40 newtons pushing right and 40 newtons pushing left. What is its net force?

Please select an answer first.

Correct answer: C

The correct answer is 0 newtons.

  1. Identify the motion idea: Determine whether the question asks about force, motion, speed, acceleration, mass, weight, or an interaction.
  2. Connect the evidence: Equal opposite forces cancel, so the net force is zero.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

Equal opposite forces cancel, so the net force is zero.

4. QuestionMultiple choice

A 2-kilogram object experiences a net force of 8 newtons. What is its acceleration?

Please select an answer first.

Correct answer: D

The correct answer is 4 meters per second squared.

  1. Identify the motion idea: Determine whether the question asks about force, motion, speed, acceleration, mass, weight, or an interaction.
  2. Connect the evidence: Using F = ma, acceleration equals force divided by mass: 8 newtons ÷ 2 kilograms = 4 meters per second squared.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

Using F = ma, acceleration equals force divided by mass: 8 newtons ÷ 2 kilograms = 4 meters per second squared.

5. QuestionMultiple choice

How are mass and weight different?

Please select an answer first.

Correct answer: A

The correct answer is Mass is the amount of matter, while weight is the force of gravity on that mass..

  1. Identify the motion idea: Determine whether the question asks about force, motion, speed, acceleration, mass, weight, or an interaction.
  2. Connect the evidence: Mass is measured in kilograms; weight is a gravitational force measured in newtons and can vary with gravity.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

Mass is measured in kilograms; weight is a gravitational force measured in newtons and can vary with gravity.

6. QuestionMultiple choice

What happens to an object's weight on the Moon compared with Earth?

Please select an answer first.

Correct answer: B

The correct answer is Its weight decreases because the Moon's gravitational pull is weaker..

  1. Identify the motion idea: Determine whether the question asks about force, motion, speed, acceleration, mass, weight, or an interaction.
  2. Connect the evidence: Weight depends on gravitational field strength, while the object's mass remains the same.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

Weight depends on gravitational field strength, while the object's mass remains the same.

7. QuestionMultiple choice

Why can a moving object continue at constant velocity after a push ends in an ideal frictionless model?

Please select an answer first.

Correct answer: C

The correct answer is No unbalanced force acts to change its motion..

  1. Identify the motion idea: Determine whether the question asks about force, motion, speed, acceleration, mass, weight, or an interaction.
  2. Connect the evidence: Newton's first law says constant velocity continues when net force is zero.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

Newton's first law says constant velocity continues when net force is zero.

8. QuestionMultiple choice

What would most likely reduce the acceleration of a loaded cart pushed with the same force?

Please select an answer first.

Correct answer: D

The correct answer is Adding more mass to the cart.

  1. Identify the motion idea: Determine whether the question asks about force, motion, speed, acceleration, mass, weight, or an interaction.
  2. Connect the evidence: For the same net force, greater mass produces less acceleration.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

For the same net force, greater mass produces less acceleration.

9. QuestionMultiple choice

Why is turning a bicycle an example of acceleration?

Please select an answer first.

Correct answer: A

The correct answer is The bicycle's velocity changes direction..

  1. Identify the motion idea: Determine whether the question asks about force, motion, speed, acceleration, mass, weight, or an interaction.
  2. Connect the evidence: Acceleration includes any change in velocity, including a change in direction.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

Acceleration includes any change in velocity, including a change in direction.

10. QuestionMultiple choice

Which investigation best tests how surface type affects friction?

Please select an answer first.

Correct answer: B

The correct answer is Pull the same object with the same method across different surfaces and compare the force needed..

  1. Identify the motion idea: Determine whether the question asks about force, motion, speed, acceleration, mass, weight, or an interaction.
  2. Connect the evidence: A fair test controls other variables and compares the measured force required for motion.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

A fair test controls other variables and compares the measured force required for motion.

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