← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 396 · 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 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A force of 350 N did 350 J of work. How many metres did the object move?
  3. 3.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  6. 6.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  10. 10.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  14. 14.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  15. 15.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ Pushing a crate 6 m took 2400 J of work. What force was used, in newtons?
  17. 17.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Pushing a crate 1 m took 80 J of work. What force was used, in newtons?
  19. 19.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ Pushing a crate 2 m took 940 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 470 N pushes a cart 7 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 190 N did 1900 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 260 N did 260 J of work. How many metres did the object move?
  24. 24.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 7 m took 700 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 450 N pushes a cart 8 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 150 N pushes a cart 4 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 390 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 290 N pushes a cart 10 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ Pushing a crate 3 m took 1200 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 220 N did 2200 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 500 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ Pushing a crate 3 m took 300 J of work. What force was used, in newtons?

Answer key

  1. 640
  2. 1
  3. 200
  4. 100
  5. load ÷ effort
  6. 1000
  7. 6
  8. 6
  9. no, work stays the same
  10. 700
  11. 4
  12. 400
  13. through a distance
  14. joule (J)
  15. 280
  16. 400
  17. 700
  18. 80
  19. 700
  20. 470
  21. 3290
  22. 10
  23. 1
  24. 450
  25. 1380
  26. 100
  27. 3600
  28. 6
  29. 600
  30. 1560
  31. 2900
  32. 100
  33. 400
  34. 10
  35. 950
  36. 3
  37. 500
  38. 2
  39. 850
  40. 100

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