← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 234 · 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.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  2. 2.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Pushing a crate 4 m took 1840 J of work. What force was used, in newtons?
  5. 5.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 6 m took 60 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  10. 10.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
  13. 13.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 50 N did 400 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
  16. 16.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  18. 18.🏋️ Pushing a crate 3 m took 810 J of work. What force was used, in newtons?
  19. 19.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  20. 20.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Pushing a crate 9 m took 1620 J of work. What force was used, in newtons?
  22. 22.🏋️ 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?
  23. 23.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ 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?
  26. 26.🏋️ A force of 130 N pushes a cart 9 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 250 N pushes a cart 5 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ Pushing a crate 8 m took 2720 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  36. 36.🏋️ A force of 500 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 340 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 5 m took 2450 J of work. What force was used, in newtons?

Answer key

  1. joule (J)
  2. 200
  3. 850
  4. 460
  5. 50
  6. 2
  7. 10
  8. 600
  9. load ÷ effort
  10. 2
  11. 2
  12. 3
  13. 450
  14. 8
  15. 9
  16. 6
  17. through a distance
  18. 270
  19. no, work stays the same
  20. 2
  21. 180
  22. 330
  23. 750
  24. 180
  25. 130
  26. 1170
  27. 850
  28. 800
  29. 2
  30. 1250
  31. 2
  32. 180
  33. 340
  34. 5
  35. less effort
  36. 2500
  37. 4
  38. 340
  39. 500
  40. 490

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids