Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 664 · 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 force of 380 N did 760 J of work. How many metres did the object move?
2. 2.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
3. 3.🏋️ A force of 430 N pushes a cart 9 m along the floor. How much work is done, in joules?
4. 4.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
5. 5.🏋️ A 9 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.🏋️ A force of 30 N did 30 J of work. How many metres did the object move?
7. 7.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
8. 8.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
9. 9.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
10. 10.🏋️ A force of 360 N pushes a cart 2 m along the floor. How much work is done, in joules?
11. 11.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
12. 12.🏋️ 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?
13. 13.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
14. 14.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
15. 15.🏋️ A force of 400 N pushes a cart 7 m along the floor. How much work is done, in joules?
16. 16.🏋️ A force of 370 N did 2960 J of work. How many metres did the object move?
17. 17.🏋️ A force of 220 N did 880 J of work. How many metres did the object move?
18. 18.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.🏋️ Pushing a crate 5 m took 1300 J of work. What force was used, in newtons?
20. 20.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
21. 21.🏋️ A force of 360 N pushes a cart 8 m along the floor. How much work is done, in joules?
22. 22.🏋️ A force of 370 N did 1850 J of work. How many metres did the object move?
23. 23.🏋️ Pushing a crate 8 m took 3040 J of work. What force was used, in newtons?
24. 24.🏋️ A force of 360 N did 3600 J of work. How many metres did the object move?
25. 25.🏋️ A 14 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.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
27. 27.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
28. 28.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
29. 29.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
30. 30.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
31. 31.🏋️ A force of 410 N pushes a cart 1 m along the floor. How much work is done, in joules?
32. 32.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
33. 33.🏋️ 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?
34. 34.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
35. 35.🏋️ Pushing a crate 1 m took 240 J of work. What force was used, in newtons?
36. 36.🏋️ Pushing a crate 5 m took 100 J of work. What force was used, in newtons?
37. 37.🏋️ A force of 460 N pushes a cart 4 m along the floor. How much work is done, in joules?
38. 38.🏋️ An 18 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 machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
40. 40.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)

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