← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 761 · 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 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A force of 270 N pushes a cart 7 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  4. 4.🏋️ Pushing a crate 2 m took 800 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 220 N pushes a cart 9 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Pushing a crate 10 m took 800 J of work. What force was used, in newtons?
  8. 8.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Pushing a crate 1 m took 170 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 480 N did 2400 J of work. How many metres did the object move?
  14. 14.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 80 N pushes a cart 4 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 410 N pushes a cart 9 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 7 m took 2310 J of work. What force was used, in newtons?
  20. 20.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  21. 21.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 500 N did 500 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 450 N did 2250 J of work. How many metres did the object move?
  24. 24.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 160 N did 640 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Pushing a crate 1 m took 180 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 130 N pushes a cart 7 m along the floor. How much work is done, in joules?
  30. 30.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  31. 31.🏋️ Pushing a crate 8 m took 480 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 240 N did 1200 J of work. How many metres did the object move?
  34. 34.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 160 N pushes a cart 6 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 10 m took 2200 J of work. What force was used, in newtons?
  37. 37.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  38. 38.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  40. 40.🏋️ A force of 410 N pushes a cart 1 m along the floor. How much work is done, in joules?

Answer key

  1. 420
  2. 1890
  3. through a distance
  4. 400
  5. 1980
  6. 560
  7. 80
  8. 400
  9. 170
  10. 4
  11. 100
  12. 190
  13. 5
  14. 300
  15. 320
  16. 280
  17. 150
  18. 3690
  19. 330
  20. load ÷ effort
  21. 800
  22. 1
  23. 5
  24. 100
  25. 4
  26. 6
  27. 60
  28. 180
  29. 910
  30. joule (J)
  31. 60
  32. 650
  33. 5
  34. 80
  35. 960
  36. 220
  37. less effort
  38. 350
  39. no, work stays the same
  40. 410

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