← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 865 · 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.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  2. 2.🏋️ A force of 180 N pushes a cart 2 m along the floor. How much work is done, in joules?
  3. 3.🏋️ 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?
  4. 4.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  6. 6.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 1 m took 10 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 470 N did 1410 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 7 m took 210 J of work. What force was used, in newtons?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  13. 13.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  17. 17.🏋️ 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)
  18. 18.🏋️ A force of 120 N did 240 J of work. How many metres did the object move?
  19. 19.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ Pushing a crate 7 m took 2100 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 280 N pushes a cart 1 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 170 N pushes a cart 2 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 290 N did 2320 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 270 N pushes a cart 10 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  30. 30.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ Pushing a crate 4 m took 680 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 30 N did 240 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 470 N did 3290 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 2 m took 560 J of work. What force was used, in newtons?
  37. 37.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ 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?

Answer key

  1. through a distance
  2. 360
  3. 850
  4. 3
  5. joule (J)
  6. 6
  7. 10
  8. 3
  9. 800
  10. 3
  11. 30
  12. load ÷ effort
  13. 5
  14. 350
  15. 40
  16. no, work stays the same
  17. 550
  18. 2
  19. 600
  20. 300
  21. 280
  22. 340
  23. 450
  24. 2
  25. 8
  26. 700
  27. 200
  28. 2700
  29. less effort
  30. 100
  31. 500
  32. 170
  33. 8
  34. 7
  35. 900
  36. 280
  37. 140
  38. 520
  39. 150
  40. 180

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