← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 307 · 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 force of 100 N did 200 J of work. How many metres did the object move?
  2. 2.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  3. 3.🏋️ Pushing a crate 10 m took 4300 J of work. What force was used, in newtons?
  4. 4.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A force of 320 N did 2880 J of work. How many metres did the object move?
  6. 6.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  7. 7.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  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 machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 170 N did 340 J of work. How many metres did the object move?
  15. 15.🏋️ A 20 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.🏋️ A force of 430 N pushes a cart 9 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 410 N pushes a cart 8 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  21. 21.🏋️ A force of 20 N did 160 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ 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)
  25. 25.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 380 N pushes a cart 2 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 300 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 160 N did 1600 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 6 m took 600 J of work. What force was used, in newtons?
  32. 32.🏋️ A 12 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.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 1 m took 10 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 130 N did 1300 J of work. How many metres did the object move?
  37. 37.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Pushing a crate 4 m took 760 J of work. What force was used, in newtons?
  39. 39.🏋️ 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?
  40. 40.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 2
  2. joule (J)
  3. 430
  4. 60
  5. 9
  6. through a distance
  7. 250
  8. less effort
  9. no, work stays the same
  10. 2
  11. 420
  12. 4
  13. 250
  14. 2
  15. 400
  16. 3870
  17. 3280
  18. 400
  19. 3
  20. load ÷ effort
  21. 8
  22. 390
  23. 6
  24. 700
  25. 210
  26. 760
  27. 3000
  28. 6
  29. 10
  30. 3
  31. 100
  32. 600
  33. 6
  34. 700
  35. 10
  36. 10
  37. 200
  38. 190
  39. 130
  40. 550

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