Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 559 · 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.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
2. 2.🏋️ A force of 220 N did 1100 J of work. How many metres did the object move?
3. 3.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
4. 4.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
5. 5.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
6. 6.🏋️ Pushing a crate 2 m took 40 J of work. What force was used, in newtons?
7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
8. 8.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
9. 9.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
10. 10.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
11. 11.🏋️ A force of 210 N pushes a cart 9 m along the floor. How much work is done, in joules?
12. 12.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
13. 13.🏋️ 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)
14. 14.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
15. 15.🏋️ A force of 480 N pushes a cart 9 m along the floor. How much work is done, in joules?
16. 16.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
17. 17.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
18. 18.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
20. 20.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
21. 21.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
22. 22.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
23. 23.🏋️ A force of 340 N pushes a cart 4 m along the floor. How much work is done, in joules?
24. 24.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
25. 25.🏋️ A force of 370 N did 740 J of work. How many metres did the object move?
26. 26.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
27. 27.🏋️ 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?
28. 28.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
29. 29.🏋️ 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?
30. 30.🏋️ A force of 240 N pushes a cart 4 m along the floor. How much work is done, in joules?
31. 31.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
32. 32.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
33. 33.🏋️ A force of 350 N did 350 J of work. How many metres did the object move?
34. 34.🏋️ Pushing a crate 3 m took 420 J of work. What force was used, in newtons?
35. 35.🏋️ Pushing a crate 4 m took 2000 J of work. What force was used, in newtons?
36. 36.🏋️ Pushing a crate 5 m took 400 J of work. What force was used, in newtons?
37. 37.🏋️ A force of 400 N pushes a cart 6 m along the floor. How much work is done, in joules?
38. 38.🏋️ A force of 500 N did 3500 J of work. How many metres did the object move?
39. 39.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
40. 40.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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