Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 209 · 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 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
2. 2.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
3. 3.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
4. 4.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
5. 5.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
6. 6.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
8. 8.🏋️ A force of 330 N pushes a cart 7 m along the floor. How much work is done, in joules?
9. 9.🏋️ Pushing a crate 10 m took 200 J of work. What force was used, in newtons?
10. 10.🏋️ Pushing a crate 7 m took 1540 J of work. What force was used, in newtons?
11. 11.🏋️ A force of 470 N did 1410 J of work. How many metres did the object move?
12. 12.🏋️ 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?
13. 13.🏋️ A force of 460 N pushes a cart 8 m along the floor. How much work is done, in joules?
14. 14.🏋️ 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?
15. 15.🏋️ A force of 50 N pushes a cart 10 m along the floor. How much work is done, in joules?
16. 16.🏋️ Pushing a crate 7 m took 210 J of work. What force was used, in newtons?
17. 17.🏋️ Pushing a crate 5 m took 1050 J of work. What force was used, in newtons?
18. 18.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
19. 19.🏋️ Pushing a crate 8 m took 3520 J of work. What force was used, in newtons?
20. 20.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
21. 21.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
22. 22.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
23. 23.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
24. 24.🏋️ Pushing a crate 6 m took 2580 J of work. What force was used, in newtons?
25. 25.🏋️ Pushing a crate 9 m took 3150 J of work. What force was used, in newtons?
26. 26.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
27. 27.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
28. 28.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
29. 29.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
30. 30.🏋️ A force of 200 N did 200 J of work. How many metres did the object move?
31. 31.🏋️ Pushing a crate 6 m took 720 J of work. What force was used, in newtons?
32. 32.🏋️ A force of 60 N did 480 J of work. How many metres did the object move?
33. 33.🏋️ 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)
34. 34.🏋️ Pushing a crate 2 m took 820 J of work. What force was used, in newtons?
35. 35.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
36. 36.🏋️ A force of 190 N pushes a cart 2 m along the floor. How much work is done, in joules?
37. 37.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
38. 38.🏋️ Pushing a crate 8 m took 2640 J of work. What force was used, in newtons?
39. 39.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
40. 40.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) only upwards (d) without moving it

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