Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 464 · 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.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
2. 2.🏋️ 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?
3. 3.🏋️ 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)
4. 4.🏋️ A force of 450 N pushes a cart 8 m along the floor. How much work is done, in joules?
5. 5.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
6. 6.🏋️ A force of 490 N pushes a cart 9 m along the floor. How much work is done, in joules?
7. 7.🏋️ A force of 280 N did 1120 J of work. How many metres did the object move?
8. 8.🏋️ A force of 500 N pushes a cart 3 m along the floor. How much work is done, in joules?
9. 9.🏋️ A force of 400 N pushes a cart 9 m along the floor. How much work is done, in joules?
10. 10.🏋️ Pushing a crate 9 m took 3060 J of work. What force was used, in newtons?
11. 11.🏋️ A force of 250 N did 1250 J of work. How many metres did the object move?
12. 12.🏋️ A force of 100 N pushes a cart 5 m along the floor. How much work is done, in joules?
13. 13.🏋️ Pushing a crate 6 m took 1560 J of work. What force was used, in newtons?
14. 14.🏋️ A force of 100 N pushes a cart 6 m along the floor. How much work is done, in joules?
15. 15.🏋️ Pushing a crate 1 m took 450 J of work. What force was used, in newtons?
16. 16.🏋️ 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?
17. 17.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
18. 18.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
19. 19.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
20. 20.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
21. 21.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
22. 22.🏋️ A force of 220 N did 1540 J of work. How many metres did the object move?
23. 23.🏋️ A force of 130 N did 910 J of work. How many metres did the object move?
24. 24.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
25. 25.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
26. 26.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
27. 27.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
28. 28.🏋️ Pushing a crate 7 m took 490 J of work. What force was used, in newtons?
29. 29.🏋️ A 14 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.🏋️ A force of 10 N pushes a cart 9 m along the floor. How much work is done, in joules?
31. 31.🏋️ Pushing a crate 9 m took 1260 J of work. What force was used, in newtons?
32. 32.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
33. 33.🏋️ Pushing a crate 9 m took 2430 J of work. What force was used, in newtons?
34. 34.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?
35. 35.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?
36. 36.🏋️ A force of 70 N did 140 J of work. How many metres did the object move?
37. 37.🏋️ A 6 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 machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
39. 39.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
40. 40.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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