Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 701 · 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) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
2. 2.🏋️ A force of 70 N did 210 J of work. How many metres did the object move?
3. 3.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
4. 4.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
5. 5.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
6. 6.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
7. 7.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
8. 8.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
9. 9.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
10. 10.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
11. 11.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
12. 12.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
13. 13.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
14. 14.🏋️ A force of 440 N did 2200 J of work. How many metres did the object move?
15. 15.🏋️ Pushing a crate 7 m took 1050 J of work. What force was used, in newtons?
16. 16.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
17. 17.🏋️ 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)
18. 18.🏋️ 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)
19. 19.🏋️ Pushing a crate 8 m took 1280 J of work. What force was used, in newtons?
20. 20.🏋️ A 19 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 force of 420 N pushes a cart 8 m along the floor. How much work is done, in joules?
22. 22.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
23. 23.🏋️ A force of 420 N did 4200 J of work. How many metres did the object move?
24. 24.🏋️ Pushing a crate 1 m took 70 J of work. What force was used, in newtons?
25. 25.🏋️ Pushing a crate 6 m took 2940 J of work. What force was used, in newtons?
26. 26.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
27. 27.🏋️ A force of 360 N did 3240 J of work. How many metres did the object move?
28. 28.🏋️ A force of 360 N pushes a cart 4 m along the floor. How much work is done, in joules?
29. 29.🏋️ 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?
30. 30.🏋️ Pushing a crate 10 m took 3000 J of work. What force was used, in newtons?
31. 31.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
32. 32.🏋️ A force of 420 N did 840 J of work. How many metres did the object move?
33. 33.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
34. 34.🏋️ A force of 150 N pushes a cart 2 m along the floor. How much work is done, in joules?
35. 35.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
36. 36.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
37. 37.🏋️ A force of 250 N pushes a cart 9 m along the floor. How much work is done, in joules?
38. 38.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
39. 39.🏋️ A force of 250 N pushes a cart 5 m along the floor. How much work is done, in joules?
40. 40.🏋️ Pushing a crate 2 m took 800 J of work. What force was used, in newtons?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids