Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 979 · 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 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?
2. 2.🏋️ A force of 30 N did 150 J of work. How many metres did the object move?
3. 3.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
4. 4.🏋️ Pushing a crate 4 m took 1120 J of work. What force was used, in newtons?
5. 5.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
6. 6.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
7. 7.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
8. 8.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
9. 9.🏋️ Pushing a crate 2 m took 900 J of work. What force was used, in newtons?
10. 10.🏋️ A 9 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) only upwards (b) through a distance (c) without moving it (d) very slowly
12. 12.🏋️ A force of 410 N pushes a cart 9 m along the floor. How much work is done, in joules?
13. 13.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
14. 14.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
15. 15.🏋️ A force of 300 N pushes a cart 5 m along the floor. How much work is done, in joules?
16. 16.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
17. 17.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
18. 18.🏋️ Pushing a crate 8 m took 720 J of work. What force was used, in newtons?
19. 19.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
20. 20.🏋️ Pushing a crate 7 m took 70 J of work. What force was used, in newtons?
21. 21.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
22. 22.🏋️ Pushing a crate 8 m took 560 J of work. What force was used, in newtons?
23. 23.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
24. 24.🏋️ Pushing a crate 6 m took 2220 J of work. What force was used, in newtons?
25. 25.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
26. 26.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
27. 27.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
28. 28.🏋️ 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?
29. 29.🏋️ Pushing a crate 10 m took 1500 J of work. What force was used, in newtons?
30. 30.🏋️ 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?
31. 31.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
32. 32.🏋️ Pushing a crate 8 m took 2160 J of work. What force was used, in newtons?
33. 33.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
34. 34.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
35. 35.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
36. 36.🏋️ A force of 380 N pushes a cart 4 m along the floor. How much work is done, in joules?
37. 37.🏋️ A force of 370 N pushes a cart 8 m along the floor. How much work is done, in joules?
38. 38.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
39. 39.🏋️ A force of 360 N pushes a cart 2 m along the floor. How much work is done, in joules?
40. 40.🏋️ A force of 50 N pushes a cart 3 m along the floor. How much work is done, in joules?

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