Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 181 · 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) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
2. 2.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
3. 3.🏋️ Pushing a crate 2 m took 380 J of work. What force was used, in newtons?
4. 4.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
5. 5.🏋️ A force of 290 N pushes a cart 7 m along the floor. How much work is done, in joules?
6. 6.🏋️ A force of 260 N pushes a cart 8 m along the floor. How much work is done, in joules?
7. 7.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
8. 8.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
9. 9.🏋️ A force of 190 N pushes a cart 9 m along the floor. How much work is done, in joules?
10. 10.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
11. 11.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
12. 12.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
13. 13.🏋️ Pushing a crate 1 m took 180 J of work. What force was used, in newtons?
14. 14.🏋️ Pushing a crate 5 m took 1950 J of work. What force was used, in newtons?
15. 15.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
16. 16.🏋️ A force of 160 N did 1280 J of work. How many metres did the object move?
17. 17.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
18. 18.🏋️ Pushing a crate 3 m took 1440 J of work. What force was used, in newtons?
19. 19.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
20. 20.🏋️ 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?
21. 21.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
22. 22.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
23. 23.🏋️ A force of 460 N did 460 J of work. How many metres did the object move?
24. 24.🏋️ Pushing a crate 9 m took 450 J of work. What force was used, in newtons?
25. 25.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
26. 26.🏋️ 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?
27. 27.🏋️ A force of 320 N did 1280 J of work. How many metres did the object move?
28. 28.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
29. 29.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
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 force of 130 N pushes a cart 4 m along the floor. How much work is done, in joules?
32. 32.🏋️ A force of 220 N did 220 J of work. How many metres did the object move?
33. 33.🏋️ A force of 230 N pushes a cart 4 m along the floor. How much work is done, in joules?
34. 34.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
35. 35.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?
36. 36.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
37. 37.🏋️ A force of 460 N pushes a cart 7 m along the floor. How much work is done, in joules?
38. 38.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
39. 39.🏋️ 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?
40. 40.🏋️ A force of 180 N pushes a cart 8 m along the floor. How much work is done, in joules?

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