Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 675 · 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.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
2. 2.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
3. 3.🏋️ A force of 180 N pushes a cart 2 m along the floor. How much work is done, in joules?
4. 4.🏋️ Pushing a crate 7 m took 1750 J of work. What force was used, in newtons?
5. 5.🏋️ 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)
6. 6.🏋️ 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
7. 7.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
8. 8.🏋️ Pushing a crate 2 m took 720 J of work. What force was used, in newtons?
9. 9.🏋️ A force of 220 N did 220 J of work. How many metres did the object move?
10. 10.🏋️ A force of 240 N pushes a cart 4 m along the floor. How much work is done, in joules?
11. 11.🏋️ 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?
12. 12.🏋️ Pushing a crate 6 m took 2280 J of work. What force was used, in newtons?
13. 13.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
14. 14.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
15. 15.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
17. 17.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
18. 18.🏋️ A force of 270 N did 2160 J of work. How many metres did the object move?
19. 19.🏋️ 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?
20. 20.🏋️ A force of 450 N pushes a cart 5 m along the floor. How much work is done, in joules?
21. 21.🏋️ Pushing a crate 3 m took 270 J of work. What force was used, in newtons?
22. 22.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
23. 23.🏋️ A force of 470 N pushes a cart 1 m along the floor. How much work is done, in joules?
24. 24.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
25. 25.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
26. 26.🏋️ A force of 390 N did 1950 J of work. How many metres did the object move?
27. 27.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
28. 28.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
29. 29.🏋️ 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?
30. 30.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
31. 31.🏋️ A 19 kg box is lifted straight up by 4 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) effort ÷ load (c) load × effort (d) load ÷ effort
33. 33.🏋️ A force of 320 N pushes a cart 2 m along the floor. How much work is done, in joules?
34. 34.🏋️ A force of 310 N pushes a cart 6 m along the floor. How much work is done, in joules?
35. 35.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
36. 36.🏋️ A force of 390 N did 3900 J of work. How many metres did the object move?
37. 37.🏋️ Pushing a crate 2 m took 980 J of work. What force was used, in newtons?
38. 38.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
39. 39.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
40. 40.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)

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