Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 206 · 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.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
2. 2.🏋️ Pushing a crate 6 m took 3000 J of work. What force was used, in newtons?
3. 3.🏋️ A force of 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
4. 4.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
6. 6.🏋️ A force of 490 N pushes a cart 7 m along the floor. How much work is done, in joules?
7. 7.🏋️ A force of 120 N did 960 J of work. How many metres did the object move?
8. 8.🏋️ A force of 430 N pushes a cart 1 m along the floor. How much work is done, in joules?
9. 9.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
10. 10.🏋️ A force of 110 N did 330 J of work. How many metres did the object move?
11. 11.🏋️ 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?
12. 12.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
13. 13.🏋️ Pushing a crate 10 m took 2200 J of work. What force was used, in newtons?
14. 14.🏋️ A force of 340 N pushes a cart 10 m along the floor. How much work is done, in joules?
15. 15.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
16. 16.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
17. 17.🏋️ A force of 190 N did 950 J of work. How many metres did the object move?
18. 18.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
19. 19.🏋️ Pushing a crate 7 m took 3360 J of work. What force was used, in newtons?
20. 20.🏋️ Pushing a crate 9 m took 2880 J of work. What force was used, in newtons?
21. 21.🏋️ A force of 10 N did 20 J of work. How many metres did the object move?
22. 22.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
23. 23.🏋️ A force of 80 N pushes a cart 7 m along the floor. How much work is done, in joules?
24. 24.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
25. 25.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
26. 26.🏋️ A force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
27. 27.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
28. 28.🏋️ A force of 80 N did 480 J of work. How many metres did the object move?
29. 29.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
30. 30.🏋️ A force of 410 N did 3690 J of work. How many metres did the object move?
31. 31.🏋️ Pushing a crate 7 m took 2660 J of work. What force was used, in newtons?
32. 32.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?
33. 33.🏋️ Pushing a crate 6 m took 60 J of work. What force was used, in newtons?
34. 34.🏋️ A force of 400 N pushes a cart 2 m along the floor. How much work is done, in joules?
35. 35.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
36. 36.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
37. 37.🏋️ Pushing a crate 8 m took 1520 J of work. What force was used, in newtons?
38. 38.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
39. 39.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
40. 40.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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