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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

What is Newton's first law commonly called?

Please select an answer first.

Correct answer: A

The correct answer is The law of inertia.

  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 states that an object keeps its motion unless an unbalanced external force acts on it.
  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 states that an object keeps its motion unless an unbalanced external force acts on it.

2. QuestionMultiple choice

What is inertia?

Please select an answer first.

Correct answer: B

The correct answer is An object's tendency to resist changes in 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: Inertia depends on mass: objects with more mass resist changes in motion more strongly.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

Inertia depends on mass: objects with more mass resist changes in motion more strongly.

3. QuestionMultiple choice

Which object has more inertia?

Please select an answer first.

Correct answer: C

The correct answer is A 10-kilogram 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: Greater mass means greater resistance to changes in motion.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

Greater mass means greater resistance to changes in motion.

4. QuestionMultiple choice

What does Newton's second law connect?

Please select an answer first.

Correct answer: D

The correct answer is Net force, mass, and acceleration.

  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 second law explains that acceleration depends on net force and mass, often written as F = ma.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

Newton's second law explains that acceleration depends on net force and mass, often written as F = ma.

5. QuestionMultiple choice

If the same force acts on two objects, which object accelerates more?

Please select an answer first.

Correct answer: A

The correct answer is The object with less 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: For a fixed force, less mass produces greater acceleration.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

For a fixed force, less mass produces greater acceleration.

6. QuestionMultiple choice

What happens to acceleration if net force increases while mass stays constant?

Please select an answer first.

Correct answer: B

The correct answer is Acceleration increases..

  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 second law shows that acceleration is directly related to net force when mass is constant.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

Newton's second law shows that acceleration is directly related to net force when mass is constant.

7. QuestionMultiple choice

What does Newton's third law state?

Please select an answer first.

Correct answer: C

The correct answer is For every force, there is an equal and opposite force..

  1. Identify the motion idea: Determine whether the question asks about force, motion, speed, acceleration, mass, weight, or an interaction.
  2. Connect the evidence: Forces occur in interaction pairs acting on different objects with equal size and opposite direction.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

Forces occur in interaction pairs acting on different objects with equal size and opposite direction.

8. QuestionMultiple choice

When a swimmer pushes water backward, what happens?

Please select an answer first.

Correct answer: D

The correct answer is The water pushes the swimmer forward with an equal opposite force..

  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 swimmer and water exert paired forces on each other, producing forward motion.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

The swimmer and water exert paired forces on each other, producing forward motion.

9. QuestionMultiple choice

Why does a rocket move forward when gases are expelled backward?

Please select an answer first.

Correct answer: A

The correct answer is The expelled gases exert an equal and opposite force on the rocket..

  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 rocket-gas interaction creates a force pair that accelerates the rocket opposite the exhaust direction.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

The rocket-gas interaction creates a force pair that accelerates the rocket opposite the exhaust direction.

10. QuestionMultiple choice

Why do action-reaction forces not cancel an object's motion?

Please select an answer first.

Correct answer: B

The correct answer is They act on two different objects..

  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 third-law pair is equal and opposite, but each force acts on a separate member of the interaction.
  3. Check the net effect: Compare the direction and size of forces to decide whether motion stays the same or changes.

Newton's third-law pair is equal and opposite, but each force acts on a separate member of the interaction.

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