← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 250 · 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.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  2. 2.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A force of 230 N did 1150 J of work. How many metres did the object move?
  4. 4.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 6 m took 2520 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 190 N pushes a cart 3 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 170 N pushes a cart 7 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 400 N did 4000 J of work. How many metres did the object move?
  12. 12.🏋️ Pushing a crate 7 m took 2940 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 150 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  15. 15.🏋️ A force of 380 N pushes a cart 6 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  20. 20.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  21. 21.🏋️ A force of 500 N did 500 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 150 N did 150 J of work. How many metres did the object move?
  23. 23.🏋️ Pushing a crate 1 m took 370 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 290 N did 870 J of work. How many metres did the object move?
  25. 25.🏋️ 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)
  26. 26.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  29. 29.🏋️ 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?
  30. 30.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 2 m took 900 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 480 N did 3840 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 10 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ Pushing a crate 7 m took 2310 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 460 N pushes a cart 5 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 500 N did 1000 J of work. How many metres did the object move?
  39. 39.🏋️ A 16 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.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?

Answer key

  1. no, work stays the same
  2. 600
  3. 5
  4. 3
  5. 3
  6. 420
  7. 570
  8. 6
  9. 1190
  10. 600
  11. 10
  12. 420
  13. 1350
  14. less effort
  15. 2280
  16. 300
  17. 750
  18. 550
  19. joule (J)
  20. through a distance
  21. 1
  22. 1
  23. 370
  24. 3
  25. 950
  26. 3
  27. 5
  28. load ÷ effort
  29. 100
  30. 3
  31. 450
  32. 8
  33. 90
  34. 180
  35. 330
  36. 5
  37. 2300
  38. 2
  39. 800
  40. 6

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