Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 23 · 40 questions

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.

1. 1.🏋️ 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?
2. 2.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
3. 3.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
4. 4.🏋️ Pushing a crate 9 m took 1170 J of work. What force was used, in newtons?
5. 5.🏋️ A force of 320 N pushes a cart 6 m along the floor. How much work is done, in joules?
6. 6.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
7. 7.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
8. 8.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
9. 9.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
10. 10.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
11. 11.🏋️ A force of 110 N did 550 J of work. How many metres did the object move?
12. 12.🏋️ A 14 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.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
14. 14.🏋️ Pushing a crate 9 m took 1080 J of work. What force was used, in newtons?
15. 15.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
16. 16.🏋️ A 3 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.🏋️ Pushing a crate 7 m took 70 J of work. What force was used, in newtons?
18. 18.🏋️ A force of 420 N pushes a cart 9 m along the floor. How much work is done, in joules?
19. 19.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
20. 20.🏋️ A force of 30 N did 180 J of work. How many metres did the object move?
21. 21.🏋️ A force of 440 N pushes a cart 10 m along the floor. How much work is done, in joules?
22. 22.🏋️ Pushing a crate 3 m took 810 J of work. What force was used, in newtons?
23. 23.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
24. 24.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
25. 25.🏋️ Pushing a crate 9 m took 3240 J of work. What force was used, in newtons?
26. 26.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
27. 27.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
28. 28.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
29. 29.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
30. 30.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
31. 31.🏋️ 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?
32. 32.🏋️ Pushing a crate 5 m took 2000 J of work. What force was used, in newtons?
33. 33.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
34. 34.🏋️ Pushing a crate 1 m took 210 J of work. What force was used, in newtons?
35. 35.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
36. 36.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
37. 37.🏋️ A force of 470 N did 1410 J of work. How many metres did the object move?
38. 38.🏋️ A force of 80 N did 80 J of work. How many metres did the object move?
39. 39.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
40. 40.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort

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