← Mechanical advantage and work lesson New set →

Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 459 · 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 420 N did 2940 J of work. How many metres did the object move?
  2. 2.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  4. 4.🏋️ A force of 370 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 8 m took 1600 J of work. What force was used, in newtons?
  6. 6.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 210 N did 630 J of work. How many metres did the object move?
  8. 8.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  12. 12.🏋️ Pushing a crate 2 m took 720 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 250 N pushes a cart 10 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 160 N pushes a cart 10 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Pushing a crate 10 m took 2500 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  19. 19.🏋️ A force of 340 N pushes a cart 4 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  21. 21.🏋️ Pushing a crate 5 m took 1200 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 9 m took 4320 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 190 N did 1520 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 60 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  26. 26.🏋️ Pushing a crate 9 m took 2340 J of work. What force was used, in newtons?
  27. 27.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ Pushing a crate 2 m took 40 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 40 N did 120 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 230 N did 690 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 190 N did 1710 J of work. How many metres did the object move?
  35. 35.🏋️ 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)
  36. 36.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 5 m took 50 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 3 m took 930 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 40 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. 7
  2. 450
  3. through a distance
  4. 740
  5. 200
  6. 280
  7. 3
  8. 10
  9. 1550
  10. 350
  11. less effort
  12. 360
  13. 2500
  14. 1600
  15. 700
  16. 250
  17. 800
  18. load ÷ effort
  19. 1360
  20. no, work stays the same
  21. 240
  22. 480
  23. 8
  24. 420
  25. joule (J)
  26. 260
  27. 5
  28. 3
  29. 270
  30. 20
  31. 300
  32. 3
  33. 3
  34. 9
  35. 550
  36. 100
  37. 10
  38. 960
  39. 310
  40. 200

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