Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 368 · 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 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
2. 2.🏋️ A force of 40 N pushes a cart 8 m along the floor. How much work is done, in joules?
3. 3.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
4. 4.🏋️ A force of 170 N pushes a cart 9 m along the floor. How much work is done, in joules?
5. 5.🏋️ 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?
6. 6.🏋️ A force of 70 N pushes a cart 2 m along the floor. How much work is done, in joules?
7. 7.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
8. 8.🏋️ Pushing a crate 2 m took 600 J of work. What force was used, in newtons?
9. 9.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
10. 10.🏋️ A 15 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.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
12. 12.🏋️ Pushing a crate 2 m took 400 J of work. What force was used, in newtons?
13. 13.🏋️ A 5 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 10 m took 1300 J of work. What force was used, in newtons?
15. 15.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
16. 16.🏋️ Pushing a crate 6 m took 2640 J of work. What force was used, in newtons?
17. 17.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
18. 18.🏋️ A force of 330 N pushes a cart 7 m along the floor. How much work is done, in joules?
19. 19.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
20. 20.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
21. 21.🏋️ A force of 340 N pushes a cart 10 m along the floor. How much work is done, in joules?
22. 22.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
23. 23.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
24. 24.🏋️ Pushing a crate 4 m took 760 J of work. What force was used, in newtons?
25. 25.🏋️ Pushing a crate 1 m took 110 J of work. What force was used, in newtons?
26. 26.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
27. 27.🏋️ Pushing a crate 8 m took 1280 J of work. What force was used, in newtons?
28. 28.🏋️ A force of 130 N pushes a cart 4 m along the floor. How much work is done, in joules?
29. 29.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
30. 30.🏋️ A force of 50 N did 350 J of work. How many metres did the object move?
31. 31.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
32. 32.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
33. 33.🏋️ A force of 250 N pushes a cart 7 m along the floor. How much work is done, in joules?
34. 34.🏋️ A force of 40 N did 160 J of work. How many metres did the object move?
35. 35.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
36. 36.🏋️ Pushing a crate 8 m took 960 J of work. What force was used, in newtons?
37. 37.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
38. 38.🏋️ A force of 140 N did 1400 J of work. How many metres did the object move?
39. 39.🏋️ A force of 390 N pushes a cart 5 m along the floor. How much work is done, in joules?
40. 40.🏋️ A force of 20 N pushes a cart 5 m along the floor. How much work is done, in joules?

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