Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 243 · 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.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
2. 2.🏋️ Pushing a crate 4 m took 1560 J of work. What force was used, in newtons?
3. 3.🏋️ 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?
4. 4.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
5. 5.🏋️ Pushing a crate 7 m took 2100 J of work. What force was used, in newtons?
6. 6.🏋️ A force of 70 N did 140 J of work. How many metres did the object move?
7. 7.🏋️ Pushing a crate 7 m took 140 J of work. What force was used, in newtons?
8. 8.🏋️ Pushing a crate 5 m took 1250 J of work. What force was used, in newtons?
9. 9.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
10. 10.🏋️ A force of 460 N pushes a cart 10 m along the floor. How much work is done, in joules?
11. 11.🏋️ Pushing a crate 1 m took 250 J of work. What force was used, in newtons?
12. 12.🏋️ 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?
13. 13.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
14. 14.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
15. 15.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.🏋️ A force of 240 N pushes a cart 4 m along the floor. How much work is done, in joules?
17. 17.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
18. 18.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
20. 20.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
21. 21.🏋️ A force of 200 N did 800 J of work. How many metres did the object move?
22. 22.🏋️ A force of 440 N pushes a cart 7 m along the floor. How much work is done, in joules?
23. 23.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
24. 24.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
25. 25.🏋️ A force of 50 N did 450 J of work. How many metres did the object move?
26. 26.🏋️ Pushing a crate 6 m took 420 J of work. What force was used, in newtons?
27. 27.🏋️ 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?
28. 28.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
29. 29.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
30. 30.🏋️ A force of 280 N pushes a cart 4 m along the floor. How much work is done, in joules?
31. 31.🏋️ A force of 20 N did 160 J of work. How many metres did the object move?
32. 32.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
33. 33.🏋️ A force of 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
34. 34.🏋️ A force of 110 N did 770 J of work. How many metres did the object move?
35. 35.🏋️ Pushing a crate 1 m took 310 J of work. What force was used, in newtons?
36. 36.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
37. 37.🏋️ Pushing a crate 4 m took 1400 J of work. What force was used, in newtons?
38. 38.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
39. 39.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
40. 40.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?

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