Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 226 · 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) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
2. 2.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
3. 3.🏋️ A force of 400 N did 3600 J of work. How many metres did the object move?
4. 4.🏋️ 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?
5. 5.🏋️ A force of 100 N did 200 J of work. How many metres did the object move?
6. 6.🏋️ A force of 440 N pushes a cart 8 m along the floor. How much work is done, in joules?
7. 7.🏋️ A force of 460 N pushes a cart 10 m along the floor. How much work is done, in joules?
8. 8.🏋️ A force of 240 N pushes a cart 7 m along the floor. How much work is done, in joules?
9. 9.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
10. 10.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
11. 11.🏋️ Pushing a crate 5 m took 900 J of work. What force was used, in newtons?
12. 12.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
13. 13.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
14. 14.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
15. 15.🏋️ A force of 300 N pushes a cart 7 m along the floor. How much work is done, in joules?
16. 16.🏋️ 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?
17. 17.🏋️ Pushing a crate 3 m took 660 J of work. What force was used, in newtons?
18. 18.🏋️ A force of 220 N pushes a cart 7 m along the floor. How much work is done, in joules?
19. 19.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
20. 20.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
21. 21.🏋️ Pushing a crate 8 m took 3360 J of work. What force was used, in newtons?
22. 22.🏋️ A 19 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 force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
24. 24.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
25. 25.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
26. 26.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
27. 27.🏋️ A force of 350 N pushes a cart 10 m along the floor. How much work is done, in joules?
28. 28.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
29. 29.🏋️ Pushing a crate 6 m took 2400 J of work. What force was used, in newtons?
30. 30.🏋️ 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?
31. 31.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
32. 32.🏋️ Pushing a crate 6 m took 780 J of work. What force was used, in newtons?
33. 33.🏋️ A force of 70 N did 630 J of work. How many metres did the object move?
34. 34.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
35. 35.🏋️ Pushing a crate 4 m took 560 J of work. What force was used, in newtons?
36. 36.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
37. 37.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
38. 38.🏋️ A force of 50 N pushes a cart 8 m along the floor. How much work is done, in joules?
39. 39.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
40. 40.🏋️ Pushing a crate 8 m took 3120 J of work. What force was used, in newtons?

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