Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 122 · 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 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?
2. 2.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
3. 3.🏋️ 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)
4. 4.🏋️ A force of 150 N did 600 J of work. How many metres did the object move?
5. 5.🏋️ 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)
6. 6.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
7. 7.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
8. 8.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
9. 9.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
10. 10.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
11. 11.🏋️ A force of 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
12. 12.🏋️ Pushing a crate 1 m took 460 J of work. What force was used, in newtons?
13. 13.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
14. 14.🏋️ Pushing a crate 1 m took 500 J of work. What force was used, in newtons?
15. 15.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
16. 16.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
17. 17.🏋️ Pushing a crate 6 m took 480 J of work. What force was used, in newtons?
18. 18.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
19. 19.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
20. 20.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
21. 21.🏋️ 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?
22. 22.🏋️ A force of 420 N pushes a cart 7 m along the floor. How much work is done, in joules?
23. 23.🏋️ 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)
24. 24.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
25. 25.🏋️ 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?
26. 26.🏋️ A force of 130 N pushes a cart 2 m along the floor. How much work is done, in joules?
27. 27.🏋️ Pushing a crate 3 m took 450 J of work. What force was used, in newtons?
28. 28.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
29. 29.🏋️ Pushing a crate 5 m took 1650 J of work. What force was used, in newtons?
30. 30.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
31. 31.🏋️ A force of 390 N did 3510 J of work. How many metres did the object move?
32. 32.🏋️ A force of 50 N did 400 J of work. How many metres did the object move?
33. 33.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
34. 34.🏋️ Pushing a crate 1 m took 370 J of work. What force was used, in newtons?
35. 35.🏋️ 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?
36. 36.🏋️ Pushing a crate 4 m took 520 J of work. What force was used, in newtons?
37. 37.🏋️ 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?
38. 38.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
39. 39.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
40. 40.🏋️ A force of 450 N did 1350 J of work. How many metres did the object move?

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