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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 137 · 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.🏋️ Pushing a crate 1 m took 220 J of work. What force was used, in newtons?
  2. 2.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ Pushing a crate 10 m took 3700 J of work. What force was used, in newtons?
  4. 4.🏋️ Pushing a crate 5 m took 1550 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 4 m took 1640 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 3 m took 1320 J of work. What force was used, in newtons?
  10. 10.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 170 N pushes a cart 5 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
  18. 18.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 7 m took 2030 J of work. What force was used, in newtons?
  21. 21.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  22. 22.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  24. 24.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  25. 25.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) only upwards (d) without moving it
  27. 27.🏋️ A force of 350 N pushes a cart 3 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ Pushing a crate 2 m took 300 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 190 N did 1520 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 80 N did 400 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 380 N did 380 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 10 m took 1600 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 2 m took 260 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 290 N pushes a cart 9 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 490 N pushes a cart 5 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 40 N pushes a cart 7 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 250 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?

Answer key

  1. 220
  2. 340
  3. 370
  4. 310
  5. 410
  6. 2
  7. 500
  8. 5
  9. 440
  10. 850
  11. 330
  12. 550
  13. 300
  14. 850
  15. 250
  16. 50
  17. 2580
  18. 540
  19. 2
  20. 290
  21. joule (J)
  22. 5
  23. load ÷ effort
  24. less effort
  25. 480
  26. through a distance
  27. 1050
  28. 50
  29. 150
  30. 350
  31. 8
  32. 5
  33. 1
  34. 160
  35. 130
  36. 2610
  37. 2450
  38. 280
  39. 750
  40. 390

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