Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 256 · 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 machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
2. 2.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
3. 3.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
4. 4.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
5. 5.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
6. 6.🏋️ A force of 210 N did 210 J of work. How many metres did the object move?
7. 7.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
8. 8.🏋️ Pushing a crate 2 m took 440 J of work. What force was used, in newtons?
9. 9.🏋️ A force of 450 N pushes a cart 5 m along the floor. How much work is done, in joules?
10. 10.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
11. 11.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
12. 12.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
13. 13.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
14. 14.🏋️ A force of 430 N did 3010 J of work. How many metres did the object move?
15. 15.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
16. 16.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?
17. 17.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
18. 18.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
19. 19.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
20. 20.🏋️ Pushing a crate 4 m took 1800 J of work. What force was used, in newtons?
21. 21.🏋️ A force of 380 N did 3800 J of work. How many metres did the object move?
22. 22.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
23. 23.🏋️ 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)
24. 24.🏋️ A force of 330 N pushes a cart 8 m along the floor. How much work is done, in joules?
25. 25.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
26. 26.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
27. 27.🏋️ Pushing a crate 2 m took 620 J of work. What force was used, in newtons?
28. 28.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
29. 29.🏋️ 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?
30. 30.🏋️ A force of 70 N pushes a cart 2 m along the floor. How much work is done, in joules?
31. 31.🏋️ 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)
32. 32.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
33. 33.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
34. 34.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
35. 35.🏋️ A force of 100 N did 500 J of work. How many metres did the object move?
36. 36.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
37. 37.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
38. 38.🏋️ 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?
39. 39.🏋️ 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?
40. 40.🏋️ A 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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