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Grade 9 Forces & Motion (Mixed) Worksheet with Answers

Grade 9 (US) · Year 10 (UK) · Class 9 (India) · Physics

Unit 2: Forces & Newton's LawsBalanced & Unbalanced Forces

A mixed set on speed calculations, forces and Newton's laws of motion. This free high school worksheet has 16 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Forces & Motion (Mixed)

Grade 9 · Physics

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Name

Class

Date

Learning goal: Balanced & Unbalanced Forces

Directions: This worksheet has 2 parts. Read the instructions at the start of each part.

Example

What do we call the force of air pushing against a moving object?

Answer: air resistance (drag)

Part A

Label the diagram. Use the words in the box.

Word bank

applied forcefrictiongravitynormal force
1234
  1. 1
  2. 2
  3. 3
  4. 4
Part B

Answer each question. Use full sentences where you can.

  1. 5

    What is Newton's Third Law about?

  2. 6

    What is the difference between mass and weight?

  3. 7

    An object travels 60 meters in 6 seconds. What is its speed?

    v = ?d = 60 mt = 6 s
  4. 8

    Using F = ma, find the force on a 25 kg object accelerating at 7 m/s².

  5. 9

    A cyclist rides at 8 m/s for 10 seconds. How far does she travel?

    v = 8 m/sd = ?t = 10 s
  6. 10

    Using F = ma, find the force on a 4 kg object accelerating at 5 m/s².

  7. 11

    What do we call a push or a pull?

  8. 12

    An object travels 56 meters in 4 seconds. What is its speed?

    v = ?d = 56 mt = 4 s
  9. 13

    What is Newton's Second Law formula?

  10. 14

    A runner covers 35 meters at a steady 7 m/s. How many seconds does it take?

    v = 7 m/sd = 35 mt = ?
  11. 15

    Using F = ma, find the force on a 13 kg object accelerating at 7 m/s².

  12. 16

    A cyclist rides at 3 m/s for 10 seconds. How far does she travel?

    v = 3 m/sd = ?t = 10 s

★ Challenge corner for fast finishers

You are in a closed room with a candle, a match and a lamp. What do you light first?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/physics/9/forces_motion

Answer key (click to show)
  1. 1.applied force
  2. 2.friction
  3. 3.gravity
  4. 4.normal force
  5. 5.for every action, there is an equal and opposite reaction
  6. 6.mass is the amount of matter (kg); weight is the force of gravity on it (N)
  7. 7.10 m/s
  8. 8.175 N
  9. 9.80 m
  10. 10.20 N
  11. 11.a force
  12. 12.14 m/s
  13. 13.force = mass × acceleration (F = ma)
  14. 14.5 s
  15. 15.91 N
  16. 16.30 m
  17. ★the match (challenge corner)

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