Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 67 · 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) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
2. 2.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
3. 3.🏋️ Pushing a crate 10 m took 2800 J of work. What force was used, in newtons?
4. 4.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
5. 5.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
6. 6.🏋️ A force of 420 N pushes a cart 10 m along the floor. How much work is done, in joules?
7. 7.🏋️ A force of 260 N pushes a cart 6 m along the floor. How much work is done, in joules?
8. 8.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
9. 9.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
10. 10.🏋️ Pushing a crate 9 m took 450 J of work. What force was used, in newtons?
11. 11.🏋️ A force of 70 N did 420 J of work. How many metres did the object move?
12. 12.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
13. 13.🏋️ 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)
14. 14.🏋️ A force of 30 N pushes a cart 9 m along the floor. How much work is done, in joules?
15. 15.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
16. 16.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
17. 17.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
18. 18.🏋️ A force of 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
19. 19.🏋️ Pushing a crate 4 m took 1760 J of work. What force was used, in newtons?
20. 20.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
21. 21.🏋️ 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)
22. 22.🏋️ A force of 360 N did 1440 J of work. How many metres did the object move?
23. 23.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
24. 24.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
25. 25.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
26. 26.🏋️ A force of 90 N did 360 J of work. How many metres did the object move?
27. 27.🏋️ A force of 420 N did 3780 J of work. How many metres did the object move?
28. 28.🏋️ Pushing a crate 2 m took 540 J of work. What force was used, in newtons?
29. 29.🏋️ Pushing a crate 2 m took 320 J of work. What force was used, in newtons?
30. 30.🏋️ A force of 460 N pushes a cart 9 m along the floor. How much work is done, in joules?
31. 31.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
32. 32.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
33. 33.🏋️ Pushing a crate 9 m took 2700 J of work. What force was used, in newtons?
34. 34.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
35. 35.🏋️ A force of 80 N pushes a cart 7 m along the floor. How much work is done, in joules?
36. 36.🏋️ A force of 410 N did 4100 J of work. How many metres did the object move?
37. 37.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
38. 38.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
39. 39.🏋️ Pushing a crate 4 m took 1480 J of work. What force was used, in newtons?
40. 40.🏋️ A force of 360 N pushes a cart 5 m along the floor. How much work is done, in joules?

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