Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 30 · 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.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
2. 2.🏋️ 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
3. 3.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
4. 4.🏋️ A force of 410 N did 1230 J of work. How many metres did the object move?
5. 5.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
6. 6.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
7. 7.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
8. 8.🏋️ Pushing a crate 10 m took 1200 J of work. What force was used, in newtons?
9. 9.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
10. 10.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
11. 11.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
12. 12.🏋️ A force of 320 N did 960 J of work. How many metres did the object move?
13. 13.🏋️ A force of 200 N did 200 J of work. How many metres did the object move?
14. 14.🏋️ Pushing a crate 9 m took 3690 J of work. What force was used, in newtons?
15. 15.🏋️ A force of 410 N did 3280 J of work. How many metres did the object move?
16. 16.🏋️ A force of 50 N pushes a cart 1 m along the floor. How much work is done, in joules?
17. 17.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
18. 18.🏋️ A force of 410 N did 3690 J of work. How many metres did the object move?
19. 19.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
20. 20.🏋️ Pushing a crate 4 m took 120 J of work. What force was used, in newtons?
21. 21.🏋️ A force of 120 N did 120 J of work. How many metres did the object move?
22. 22.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
23. 23.🏋️ A force of 100 N pushes a cart 10 m along the floor. How much work is done, in joules?
24. 24.🏋️ 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?
25. 25.🏋️ A force of 320 N did 1920 J of work. How many metres did the object move?
26. 26.🏋️ Pushing a crate 2 m took 520 J of work. What force was used, in newtons?
27. 27.🏋️ Pushing a crate 8 m took 1280 J of work. What force was used, in newtons?
28. 28.🏋️ 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)
29. 29.🏋️ Pushing a crate 5 m took 1700 J of work. What force was used, in newtons?
30. 30.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
31. 31.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
32. 32.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
33. 33.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
34. 34.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
35. 35.🏋️ A force of 450 N pushes a cart 6 m along the floor. How much work is done, in joules?
36. 36.🏋️ Pushing a crate 7 m took 770 J of work. What force was used, in newtons?
37. 37.🏋️ 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?
38. 38.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
39. 39.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
40. 40.🏋️ Pushing a crate 5 m took 550 J of work. What force was used, in newtons?

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