Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 586 · 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.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
2. 2.🏋️ A force of 450 N pushes a cart 6 m along the floor. How much work is done, in joules?
3. 3.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
4. 4.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
5. 5.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
6. 6.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
7. 7.🏋️ Pushing a crate 8 m took 1360 J of work. What force was used, in newtons?
8. 8.🏋️ A force of 60 N pushes a cart 10 m along the floor. How much work is done, in joules?
9. 9.🏋️ A force of 320 N pushes a cart 7 m along the floor. How much work is done, in joules?
10. 10.🏋️ 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?
11. 11.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
12. 12.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
13. 13.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
14. 14.🏋️ Pushing a crate 8 m took 3680 J of work. What force was used, in newtons?
15. 15.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
16. 16.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
17. 17.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?
18. 18.🏋️ A 20 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 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
20. 20.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
21. 21.🏋️ Pushing a crate 5 m took 1350 J of work. What force was used, in newtons?
22. 22.🏋️ Pushing a crate 8 m took 3920 J of work. What force was used, in newtons?
23. 23.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
24. 24.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
25. 25.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
26. 26.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
27. 27.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
28. 28.🏋️ A force of 220 N did 660 J of work. How many metres did the object move?
29. 29.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
30. 30.🏋️ Pushing a crate 8 m took 3520 J of work. What force was used, in newtons?
31. 31.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
32. 32.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
33. 33.🏋️ 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?
34. 34.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
35. 35.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
36. 36.🏋️ A force of 470 N did 3760 J of work. How many metres did the object move?
37. 37.🏋️ A force of 20 N pushes a cart 7 m along the floor. How much work is done, in joules?
38. 38.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
39. 39.🏋️ A force of 90 N pushes a cart 5 m along the floor. How much work is done, in joules?
40. 40.🏋️ A force of 420 N did 3360 J of work. How many metres did the object move?

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