← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 279 · 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 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?
  2. 2.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  3. 3.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  4. 4.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  6. 6.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A force of 200 N pushes a cart 5 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 7 m took 1050 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 10 m took 600 J of work. What force was used, in newtons?
  11. 11.🏋️ Pushing a crate 3 m took 750 J of work. What force was used, in newtons?
  12. 12.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  13. 13.🏋️ A force of 450 N did 1350 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 50 N did 200 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 220 N did 220 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 370 N pushes a cart 6 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 4 m took 320 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 240 N did 480 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 1 m took 420 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 410 N pushes a cart 5 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 2 m took 440 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 3 m took 870 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 460 N did 4140 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 170 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  38. 38.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 210 N did 1260 J of work. How many metres did the object move?
  40. 40.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 50
  2. through a distance
  3. less effort
  4. 6
  5. joule (J)
  6. 550
  7. 760
  8. 1000
  9. 150
  10. 60
  11. 250
  12. no, work stays the same
  13. 3
  14. 4
  15. 240
  16. 2
  17. 6
  18. 2
  19. 240
  20. 1
  21. 2220
  22. 80
  23. 2
  24. 2
  25. 420
  26. 2050
  27. 80
  28. 5
  29. 220
  30. 850
  31. 800
  32. 30
  33. 290
  34. 9
  35. 3
  36. 510
  37. load ÷ effort
  38. 700
  39. 6
  40. 400

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