Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 160 · 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.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) polished marble (c) glass (d) ice
2. 2.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 2 (c) class 1
3. 3.🪝 What does a single fixed pulley change? (a) gravity (b) the size of the load (c) the colour of rope (d) the direction of pull
4. 4.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the effort (c) the load (d) the fulcrum
5. 5.⚖️ A seesaw balances. Asha (? N) sits 3 m from the pivot on one side; Zoya (480 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) True (b) False
7. 7.🛞 Rubbing your hands fast makes them … (a) cold (b) wet (c) magnetic (d) warm
8. 8.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
9. 9.💪 A bag has a mass of 50 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
10. 10.💪 A force is a … (a) type of sound (b) kind of colour (c) unit of time (d) push or a pull
11. 11.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
12. 12.⚖️ A lever bar balances. The load is 120 N at 50 cm from the fulcrum. The effort is 300 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
13. 13.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 3 (c) class 1
14. 14.⚖️ A lever bar balances. The load is 80 N at 20 cm from the fulcrum. The effort is 20 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
15. 15.⚖️ A lever bar balances. The load is 200 N at ? cm from the fulcrum. The effort is 20 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
16. 16.True or false: a fixed pulley rises with the load. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a wet tiled floor (c) skating on ice (d) a box pushed on carpet
18. 18.🏋️ Pushing a crate 3 m took 390 J of work. What force was used, in newtons?
19. 19.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
20. 20.⚙️ A screw is really … (a) a ramp wrapped round (b) a bent lever (c) a tiny pulley (d) a kind of wheel
21. 21.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
22. 22.🛞 Friction acts … (a) only upwards (b) only on ice (c) with the motion (d) against the motion
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 10 N, sandpaper 11 N, ice 3 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) ice (d) a glass sheet
24. 24.Which of these is a screw? (a) a bottle opener (b) a crowbar (c) a screw jack (d) a water tap handle
25. 25.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
26. 26.⚖️ Which class of lever is a pair of scissors? (a) class 2 (b) class 3 (c) class 1
27. 27.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a carpet 5 N, sandpaper 6 N. How many newtons more were needed on sandpaper than on ice?
29. 29.⚙️ Which simple machine is a door stopper? (a) inclined plane (b) screw (c) wedge (d) pulley
30. 30.True or false: a pair of scissors is a class 1 lever (fulcrum in the middle). (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a crane hook block (c) the tip of a nail (d) a well-bucket rope wheel
32. 32.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 60 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
33. 33.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wet tiled floor (c) a box pushed on carpet (d) a rough doormat
34. 34.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
35. 35.🔍 Which is the odd one out? (a) a tyre with deep treads (b) skating on ice (c) a box pushed on carpet (d) a grippy rubber sole
36. 36.💪 Which force is at work: a rolling ball slows? (a) muscular force (b) magnetic force (c) friction (d) gravity
37. 37.🏋️ A force of 430 N pushes a cart 7 m along the floor. How much work is done, in joules?
38. 38.💪 Which force pulls everything towards the Earth? (a) friction (b) magnetism (c) wind (d) gravity
39. 39.⚖️ A lever bar balances. The load is 90 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?
40. 40.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?

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