Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 540 · 40 questions

Engineer's tip (Find the topic, use the idea): Find the topic: force, friction, machine, lever class, balance, pulley or work. Use that lesson’s rule — what is in the middle, load × distance = effort × distance, effort = load ÷ ropes, work = force × distance. Write the calculation before you answer.

1. 1.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
2. 2.True or false: chalk on a gym bar gives less friction. (a) True (b) False
3. 3.🏋️ A force of 200 N did 600 J of work. How many metres did the object move?
4. 4.⚙️ A screw is really … (a) a ramp wrapped round (b) a kind of wheel (c) a bent lever (d) a tiny pulley
5. 5.True or false: a crowbar is a class 3 lever (effort in the middle). (a) True (b) False
6. 6.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
7. 7.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
8. 8.Which of these is caused by muscular force? (a) rain falls to the ground (b) pedalling a cycle (c) rubbing hands warms them (d) a river flows downhill
9. 9.Which of these is caused by magnetic force? (a) a rolling ball slows (b) a fridge magnet sticks (c) squeezing a lemon (d) rain falls to the ground
10. 10.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
11. 11.💪 Which force is at work: a fridge magnet sticks? (a) magnetic force (b) gravity (c) muscular force (d) friction
12. 12.True or false: a fixed pulley only changes direction. (a) False (b) True
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 7 N, a wooden plank 9 N, a carpet 11 N. How many newtons more were needed on a carpet than on ice?
14. 14.🏋️ A force of 270 N did 540 J of work. How many metres did the object move?
15. 15.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
16. 16.True or false: a movable pulley halves the effort. (a) False (b) True
17. 17.True or false: hitting a cricket ball is a pull. (a) True (b) False
18. 18.True or false: a wet tiled floor gives more friction. (a) True (b) False
19. 19.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) switch off gravity (c) stop all friction (d) use a smaller force
20. 20.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 40 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
21. 21.💪 A bag has a mass of 50 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
22. 22.True or false: a bottle cap is a screw. (a) True (b) False
23. 23.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) True (b) False
24. 24.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
25. 25.⚖️ A lever bar balances. The load is 180 N at ? cm from the fulcrum. The effort is 270 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
26. 26.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 60 cm and the load at 20 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
27. 27.🛞 Friction acts … (a) with the motion (b) only on ice (c) only upwards (d) against the motion
28. 28.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
29. 29.🏋️ Pushing a crate 4 m took 1200 J of work. What force was used, in newtons?
30. 30.⚖️ Which class of lever is your forearm? (a) class 3 (b) class 2 (c) class 1
31. 31.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
32. 32.🔍 Which is the odd one out? (a) sand on a slippery path (b) skating on ice (c) oil on a squeaky hinge (d) a smooth steel slide
33. 33.⚙️ Which simple machine is a bottle opener? (a) wedge (b) pulley (c) lever (d) wheel and axle
34. 34.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
35. 35.🪝 More rope sections holding a load means … (a) less effort needed (b) the load floats (c) no change (d) more effort needed
36. 36.True or false: pulling a cart is a push. (a) False (b) True
37. 37.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
38. 38.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the rock (c) on the fulcrum (d) far from the fulcrum
39. 39.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 50 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
40. 40.True or false: a window blind cord is a pulley. (a) False (b) True

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