Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 290 · 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 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?
2. 2.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
3. 3.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
4. 4.🏋️ Pushing a crate 9 m took 3330 J of work. What force was used, in newtons?
5. 5.🏋️ A 20 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.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
7. 7.🏋️ 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?
8. 8.🏋️ Pushing a crate 5 m took 2100 J of work. What force was used, in newtons?
9. 9.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
10. 10.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
11. 11.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
12. 12.🏋️ A force of 170 N did 170 J of work. How many metres did the object move?
13. 13.🏋️ Pushing a crate 1 m took 400 J of work. What force was used, in newtons?
14. 14.🏋️ A force of 490 N pushes a cart 3 m along the floor. How much work is done, in joules?
15. 15.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
16. 16.🏋️ Pushing a crate 4 m took 1200 J of work. What force was used, in newtons?
17. 17.🏋️ Pushing a crate 1 m took 290 J of work. What force was used, in newtons?
18. 18.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
19. 19.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
20. 20.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
21. 21.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
22. 22.🏋️ 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?
23. 23.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
24. 24.🏋️ 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?
25. 25.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
26. 26.🏋️ A force of 250 N pushes a cart 1 m along the floor. How much work is done, in joules?
27. 27.🏋️ A force of 500 N pushes a cart 3 m along the floor. How much work is done, in joules?
28. 28.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
29. 29.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
30. 30.🏋️ A force of 60 N pushes a cart 6 m along the floor. How much work is done, in joules?
31. 31.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
32. 32.🏋️ A force of 190 N pushes a cart 1 m along the floor. How much work is done, in joules?
33. 33.🏋️ Pushing a crate 4 m took 320 J of work. What force was used, in newtons?
34. 34.🏋️ Pushing a crate 3 m took 270 J of work. What force was used, in newtons?
35. 35.🏋️ A force of 440 N did 1760 J of work. How many metres did the object move?
36. 36.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
37. 37.🏋️ A force of 310 N pushes a cart 1 m along the floor. How much work is done, in joules?
38. 38.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
39. 39.🏋️ A force of 480 N pushes a cart 4 m along the floor. How much work is done, in joules?
40. 40.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)

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