Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 662 · 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 is the odd one out? (a) a grippy rubber sole (b) a box pushed on carpet (c) chalk on a gym bar (d) skating on ice
2. 2.Which of these is a screw? (a) a truck loading ramp (b) a nut and bolt (c) a claw hammer on a nail (d) a well-bucket rope wheel
3. 3.🏋️ Pushing a crate 7 m took 3080 J of work. What force was used, in newtons?
4. 4.🔍 Which is the odd one out? (a) powder on a carrom board (b) a smooth steel slide (c) a wet tiled floor (d) a rough doormat
5. 5.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
6. 6.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
7. 7.💪 Two children push a box to the right, one with 35 N and the other with 75 N. What is the net (total) force on the box, in newtons?
8. 8.⚙️ Which simple machine is a screw jack? (a) lever (b) screw (c) wedge (d) pulley
9. 9.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
10. 10.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
11. 11.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the load (d) nothing
12. 12.🏋️ Pushing a crate 9 m took 450 J of work. What force was used, in newtons?
13. 13.💪 A force is a … (a) type of sound (b) unit of time (c) kind of colour (d) push or a pull
14. 14.True or false: a fixed pulley halves the effort. (a) False (b) True
15. 15.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) near the fulcrum (c) on the fulcrum (d) far from the fulcrum
16. 16.True or false: a wood screw is a screw. (a) True (b) False
17. 17.True or false: a pair of scissors is a class 3 lever (effort in the middle). (a) True (b) False
18. 18.🏋️ Pushing a crate 10 m took 100 J of work. What force was used, in newtons?
19. 19.💪 Which force pulls everything towards the Earth? (a) wind (b) magnetism (c) friction (d) gravity
20. 20.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
21. 21.🪝 A pulley system lifts an 810 N load with an effort of 270 N. What is its mechanical advantage (MA)?
22. 22.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, a carpet 9 N, sandpaper 12 N. How many newtons more were needed on sandpaper than on a glass sheet?
24. 24.⚖️ What is the pivot point of a lever called? (a) the axle (b) the load (c) the fulcrum (d) the effort
25. 25.💪 A bag has a mass of 29 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
26. 26.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
27. 27.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
28. 28.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
29. 29.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
30. 30.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 70 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
31. 31.⚙️ Which simple machine is a wood screw? (a) inclined plane (b) screw (c) pulley (d) lever
32. 32.🏋️ Pushing a crate 2 m took 140 J of work. What force was used, in newtons?
33. 33.🏋️ A force of 370 N did 1850 J of work. How many metres did the object move?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 8 N, a carpet 9 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
35. 35.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
36. 36.True or false: your forearm is a class 1 lever (fulcrum in the middle). (a) True (b) False
37. 37.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
38. 38.⚙️ A screw is really … (a) a bent lever (b) a ramp wrapped round (c) a kind of wheel (d) a tiny pulley
39. 39.💪 Which force is at work: rain falls to the ground? (a) muscular force (b) magnetic force (c) gravity (d) friction
40. 40.⚖️ A seesaw balances. Zoya (510 N) sits ? m from the pivot on one side; Kabir (340 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?

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