Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 932 · 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.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) switch off gravity (c) use a smaller force (d) stop all friction
2. 2.True or false: closing a drawer is a pull. (a) True (b) False
3. 3.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 3 N, a wooden plank 4 N, a carpet 7 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
5. 5.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) distance from fulcrum (d) time taken
6. 6.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
7. 7.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
8. 8.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
9. 9.🏋️ A force of 40 N pushes a cart 10 m along the floor. How much work is done, in joules?
10. 10.🏋️ A force of 310 N did 620 J of work. How many metres did the object move?
11. 11.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
12. 12.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) near the fulcrum (c) far from the fulcrum (d) on the rock
13. 13.🛞 How can we reduce friction in a machine? (a) make parts rough (b) press parts harder (c) add sand (d) oil the moving parts
14. 14.🏋️ A force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 2 N, a wooden plank 5 N, a carpet 8 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) ice
16. 16.🏋️ Pushing a crate 9 m took 3780 J of work. What force was used, in newtons?
17. 17.🏋️ A force of 140 N did 980 J of work. How many metres did the object move?
18. 18.True or false: a wet tiled floor gives less friction. (a) False (b) True
19. 19.True or false: a fixed pulley stays in one place. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a tyre with deep treads (c) powder on a carrom board (d) sand on a slippery path
21. 21.⚖️ A lever bar balances. The load is 270 N at 30 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
22. 22.Which of these is caused by magnetic force? (a) rain falls to the ground (b) a rolling ball slows (c) a compass needle turns (d) a river flows downhill
23. 23.🏋️ A force of 230 N pushes a cart 3 m along the floor. How much work is done, in joules?
24. 24.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
25. 25.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
26. 26.⚖️ A lever bar balances. The load is 800 N at ? cm from the fulcrum. The effort is 80 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 12 N, a carpet 13 N, ice 4 N, a glass sheet 8 N. How many newtons more were needed on a carpet than on ice?
28. 28.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
29. 29.True or false: closing a drawer is a push. (a) True (b) False
30. 30.🪝 A well winch has a handle (wheel) of radius 5 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
31. 31.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
32. 32.💪 Which force is at work: a rolling ball slows? (a) friction (b) muscular force (c) gravity (d) magnetic force
33. 33.🏋️ Pushing a crate 2 m took 160 J of work. What force was used, in newtons?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 6 N, ice 1 N, a wooden plank 4 N, a carpet 5 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) ice (d) sandpaper
35. 35.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
36. 36.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
37. 37.True or false: a box pushed on carpet gives more friction. (a) True (b) False
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 14 N, ice 3 N, a glass sheet 7 N, a carpet 11 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) sandpaper
39. 39.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 400 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.⚖️ A lever balances when … (a) the bar is short (b) turning effects match (c) both weights are equal (d) the fulcrum moves

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