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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 630 · 40 questions
TalentJR

Engineer's tip (Less force, more distance): MA = load ÷ effort. Work (J) = force (N) × distance (m); force = work ÷ distance; distance = work ÷ force. Ideal ramp: MA = length ÷ height, effort = load ÷ MA.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  3. 3.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 430 N did 4300 J of work. How many metres did the object move?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 9 m took 1170 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 390 N pushes a cart 4 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 270 N pushes a cart 3 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 60 N pushes a cart 7 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 190 N pushes a cart 8 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 220 N did 1100 J of work. How many metres did the object move?
  13. 13.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  14. 14.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 330 N pushes a cart 10 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 410 N pushes a cart 4 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  20. 20.🏋️ A force of 450 N pushes a cart 9 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 5 m took 2350 J of work. What force was used, in newtons?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 200 N did 1800 J of work. How many metres did the object move?
  24. 24.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ Pushing a crate 2 m took 140 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 20 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 7 m took 1610 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 420 N did 2100 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 10 m took 3900 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 120 N did 1200 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 140 N pushes a cart 10 m along the floor. How much work is done, in joules?

Answer key

  1. 750
  2. no, work stays the same
  3. 300
  4. 10
  5. 700
  6. 5
  7. 130
  8. 1560
  9. 810
  10. 420
  11. 1520
  12. 5
  13. joule (J)
  14. 40
  15. 2
  16. 3300
  17. 4
  18. 1640
  19. less effort
  20. 4050
  21. 470
  22. 850
  23. 9
  24. 50
  25. 650
  26. 70
  27. 20
  28. 230
  29. 460
  30. 2
  31. 750
  32. 150
  33. 3
  34. 300
  35. 250
  36. 130
  37. 5
  38. 390
  39. 10
  40. 1400

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