Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 340 · 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 machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
2. 2.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
3. 3.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
4. 4.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
5. 5.🏋️ A force of 10 N did 20 J of work. How many metres did the object move?
6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
7. 7.🏋️ 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?
8. 8.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
9. 9.🏋️ A force of 130 N pushes a cart 4 m along the floor. How much work is done, in joules?
10. 10.🏋️ Pushing a crate 5 m took 1100 J of work. What force was used, in newtons?
11. 11.🏋️ A 7 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.🏋️ Pushing a crate 9 m took 450 J of work. What force was used, in newtons?
13. 13.🏋️ A force of 460 N did 4140 J of work. How many metres did the object move?
14. 14.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
15. 15.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
16. 16.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
17. 17.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
18. 18.🏋️ Pushing a crate 3 m took 120 J of work. What force was used, in newtons?
19. 19.🏋️ A force of 170 N did 1360 J of work. How many metres did the object move?
20. 20.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
21. 21.🏋️ A force of 350 N pushes a cart 6 m along the floor. How much work is done, in joules?
22. 22.🏋️ 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?
23. 23.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
24. 24.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
25. 25.🏋️ A force of 30 N did 30 J of work. How many metres did the object move?
26. 26.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
27. 27.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
28. 28.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
29. 29.🏋️ A force of 250 N did 1750 J of work. How many metres did the object move?
30. 30.🏋️ Pushing a crate 4 m took 560 J of work. What force was used, in newtons?
31. 31.🏋️ A force of 80 N did 320 J of work. How many metres did the object move?
32. 32.🏋️ Pushing a crate 9 m took 2430 J of work. What force was used, in newtons?
33. 33.🏋️ 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?
34. 34.🏋️ A force of 170 N did 1530 J of work. How many metres did the object move?
35. 35.🏋️ A force of 390 N pushes a cart 10 m along the floor. How much work is done, in joules?
36. 36.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
37. 37.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
38. 38.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
39. 39.🏋️ A force of 50 N did 100 J of work. How many metres did the object move?
40. 40.🏋️ 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?

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