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Find the resultant of several forces

8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.MS-PS2-2, NGSS.HS-PS2-1 · England: KS3 Physics: Motion and forces, GCSE Combined Science: Forces (resultant forces)

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Score/ 16

  1. Question 1

    A skydiver's weight is 800 N. At this moment the air resistance is 200 N. What is happening to the skydiver's motion?

    200 N800 N
    • A. speeds up
    • B. falls at a constant speed
    • C. slows down

  2. Question 2

    Two forces act on a box at right angles: 30 N east and 40 N north. What is the size of the resultant force, in N?

    AnswerN

  3. Question 3

    A car's engine provides a driving force of 800 N forwards. Air resistance is 300 N and friction is 100 N, both backwards. What is the resultant force, in N?

    AnswerN

  4. Question 4

    A skydiver's weight is 700 N. At this moment the air resistance is 1000 N. What is happening to the skydiver's motion?

    1000 N700 N
    • A. speeds up
    • B. falls at a constant speed
    • C. slows down

  5. Question 5

    Two forces act on a box at right angles: 60 N east and 80 N north. What is the size of the resultant force, in N?

    AnswerN

  6. Question 6

    A car's engine provides a driving force of 1000 N forwards. Air resistance is 500 N and friction is 100 N, both backwards. What is the resultant force, in N?

    AnswerN

  7. Question 7

    A skydiver's weight is 700 N. At this moment the air resistance is 700 N. What is happening to the skydiver's motion?

    700 N700 N
    • A. speeds up
    • B. falls at a constant speed
    • C. slows down

  8. Question 8

    Two forces act on a box at right angles: 8 N east and 15 N north. What is the size of the resultant force, in N?

    AnswerN

  9. Question 9

    A car's engine provides a driving force of 1000 N forwards. Air resistance is 500 N and friction is 100 N, both backwards. What is the resultant force, in N?

    AnswerN

  10. Question 10

    A skydiver's weight is 700 N. At this moment the air resistance is 1000 N. What is happening to the skydiver's motion?

    1000 N700 N
    • A. speeds up
    • B. falls at a constant speed
    • C. slows down

  11. Question 11

    Two forces act on a box at right angles: 160 N east and 300 N north. What is the size of the resultant force, in N?

    AnswerN

  12. Question 12

    A car's engine provides a driving force of 2000 N forwards. Air resistance is 500 N and friction is 100 N, both backwards. What is the resultant force, in N?

    AnswerN

  13. Question 13

    A skydiver's weight is 500 N. At this moment the air resistance is 200 N. What is happening to the skydiver's motion?

    200 N500 N
    • A. speeds up
    • B. falls at a constant speed
    • C. slows down

  14. Question 14

    Two forces act on a box at right angles: 15 N east and 20 N north. What is the size of the resultant force, in N?

    AnswerN

  15. Question 15

    A car's engine provides a driving force of 1200 N forwards. Air resistance is 200 N and friction is 150 N, both backwards. What is the resultant force, in N?

    AnswerN

  16. Question 16

    A skydiver's weight is 700 N. At this moment the air resistance is 400 N. What is happening to the skydiver's motion?

    400 N700 N
    • A. speeds up
    • B. falls at a constant speed
    • C. slows down

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Answer key: Find the resultant of several forces

  1. 1. A. speeds up

  2. 2. 50 N

  3. 3. 400 N

  4. 4. C. slows down

  5. 5. 100 N

  6. 6. 400 N

  7. 7. B. falls at a constant speed

  8. 8. 17 N

  9. 9. 400 N

  10. 10. C. slows down

  11. 11. 340 N

  12. 12. 1400 N

  13. 13. A. speeds up

  14. 14. 25 N

  15. 15. 850 N

  16. 16. A. speeds up