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Balanced and unbalanced forces

3rd grade (Year 4 in England) · 16 questions · Common Core: NGSS.3-PS2-1, NGSS.MS-PS2-2 · England: KS3 Physics: Motion and forces (balanced forces), KS4 Combined Science: Forces

Name

Date

Score/ 16

  1. Question 1

    A sledge is at rest. It is pulled with 40 N to the left and 80 N to the right. What happens?

    40 N80 N
    • A. it stays still
    • B. it starts to move right
    • C. it starts to move left

  2. Question 2

    A box is pushed with 50 N to the left and 30 N to the right. What is the size of the resultant force, in newtons?

    50 N30 N

    AnswerN

  3. Question 3

    Balanced forces: which statement is NOT true?

    • A. Forces are measured in newtons (N).
    • B. When forces are balanced, a moving object keeps moving at the same speed in the same direction.
    • C. If an object is moving, the forces on it cannot be balanced.
    • D. A book resting on a table has balanced forces acting on it.

  4. Question 4

    A sledge is at rest. It is pulled with 80 N to the left and 80 N to the right. What happens?

    80 N80 N
    • A. it stays still
    • B. it starts to move right
    • C. it starts to move left

  5. Question 5

    A box is pushed with 80 N to the left and 55 N to the right. What is the size of the resultant force, in newtons?

    80 N55 N

    AnswerN

  6. Question 6

    Balanced forces: which statement is NOT true?

    • A. Forces are measured in kilograms.
    • B. A book resting on a table has balanced forces acting on it.
    • C. When forces are balanced, a still object stays still.
    • D. Forces are measured in newtons (N).

  7. Question 7

    A sledge is at rest. It is pulled with 20 N to the left and 50 N to the right. What happens?

    20 N50 N
    • A. it stays still
    • B. it starts to move right
    • C. it starts to move left

  8. Question 8

    A box is pushed with 80 N to the left and 25 N to the right. What is the size of the resultant force, in newtons?

    80 N25 N

    AnswerN

  9. Question 9

    Balanced forces: which statement is NOT true?

    • A. A book resting on a table has balanced forces acting on it.
    • B. If an object is moving, the forces on it cannot be balanced.
    • C. When forces are balanced, a still object stays still.
    • D. Forces are measured in newtons (N).

  10. Question 10

    A sledge is at rest. It is pulled with 50 N to the left and 80 N to the right. What happens?

    50 N80 N
    • A. it stays still
    • B. it starts to move right
    • C. it starts to move left

  11. Question 11

    A box is pushed with 80 N to the left and 65 N to the right. What is the size of the resultant force, in newtons?

    80 N65 N

    AnswerN

  12. Question 12

    Balanced forces: which statement is NOT true?

    • A. If an object is moving, the forces on it cannot be balanced.
    • B. When forces are balanced, a moving object keeps moving at the same speed in the same direction.
    • C. A book resting on a table has balanced forces acting on it.
    • D. Forces are measured in newtons (N).

  13. Question 13

    A sledge is at rest. It is pulled with 70 N to the left and 70 N to the right. What happens?

    70 N70 N
    • A. it stays still
    • B. it starts to move right
    • C. it starts to move left

  14. Question 14

    A box is pushed with 55 N to the left and 40 N to the right. What is the size of the resultant force, in newtons?

    55 N40 N

    AnswerN

  15. Question 15

    Balanced forces: which statement is NOT true?

    • A. Forces are measured in kilograms.
    • B. Forces are measured in newtons (N).
    • C. When forces are balanced, a moving object keeps moving at the same speed in the same direction.
    • D. A book resting on a table has balanced forces acting on it.

  16. Question 16

    A sledge is at rest. It is pulled with 110 N to the left and 110 N to the right. What happens?

    110 N110 N
    • A. it stays still
    • B. it starts to move right
    • C. it starts to move left

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Answer key: Balanced and unbalanced forces

  1. 1. B. it starts to move right

  2. 2. 20 N

  3. 3. C. If an object is moving, the forces on it cannot be balanced.

  4. 4. A. it stays still

  5. 5. 25 N

  6. 6. A. Forces are measured in kilograms.

  7. 7. B. it starts to move right

  8. 8. 55 N

  9. 9. B. If an object is moving, the forces on it cannot be balanced.

  10. 10. B. it starts to move right

  11. 11. 15 N

  12. 12. A. If an object is moving, the forces on it cannot be balanced.

  13. 13. A. it stays still

  14. 14. 15 N

  15. 15. A. Forces are measured in kilograms.

  16. 16. A. it stays still