Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 43 · 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 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?
2. 2.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
3. 3.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
4. 4.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
5. 5.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
6. 6.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
7. 7.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
8. 8.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
9. 9.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
10. 10.🏋️ A 3 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 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
12. 12.🏋️ A force of 350 N pushes a cart 6 m along the floor. How much work is done, in joules?
13. 13.🏋️ A force of 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
14. 14.🏋️ 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?
15. 15.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
16. 16.🏋️ Pushing a crate 5 m took 2450 J of work. What force was used, in newtons?
17. 17.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
18. 18.🏋️ A force of 330 N pushes a cart 7 m along the floor. How much work is done, in joules?
19. 19.🏋️ Pushing a crate 1 m took 480 J of work. What force was used, in newtons?
20. 20.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
21. 21.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
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 machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
24. 24.🏋️ Pushing a crate 9 m took 1440 J of work. What force was used, in newtons?
25. 25.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
26. 26.🏋️ Pushing a crate 8 m took 2080 J of work. What force was used, in newtons?
27. 27.🏋️ Pushing a crate 6 m took 1560 J of work. What force was used, in newtons?
28. 28.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
29. 29.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
30. 30.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
31. 31.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?
32. 32.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
33. 33.🏋️ Pushing a crate 9 m took 630 J of work. What force was used, in newtons?
34. 34.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
35. 35.🏋️ A force of 400 N did 400 J of work. How many metres did the object move?
36. 36.🏋️ A force of 230 N pushes a cart 4 m along the floor. How much work is done, in joules?
37. 37.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
38. 38.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
39. 39.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
40. 40.🏋️ A force of 310 N pushes a cart 8 m along the floor. How much work is done, in joules?

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