Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 561 · 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.True or false: a well winch handle is a wheel and axle. (a) True (b) False
2. 2.Which of these is a wedge? (a) a nutcracker (b) the tip of a nail (c) a steering wheel (d) a flagpole rope wheel
3. 3.⚖️ A seesaw balances. Zoya (? N) sits 1 m from the pivot on one side; Asha (120 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.🔍 Which is the odd one out? (a) a well winch handle (b) a steering wheel (c) a bottle cap (d) a water tap handle
5. 5.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 5 N, a carpet 8 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on ice?
7. 7.True or false: closing a drawer is a pull. (a) False (b) True
8. 8.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
9. 9.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
10. 10.⚖️ A lever balances when … (a) the fulcrum moves (b) both weights are equal (c) the bar is short (d) turning effects match
11. 11.True or false: the tip of a nail is a lever. (a) True (b) False
12. 12.⚖️ Which class of lever is a pair of scissors? (a) class 1 (b) class 3 (c) class 2
13. 13.🏋️ Pushing a crate 5 m took 1750 J of work. What force was used, in newtons?
14. 14.⚖️ Which class of lever is a bottle opener? (a) class 1 (b) class 3 (c) class 2
15. 15.True or false: a fixed pulley is on a flagpole top. (a) True (b) False
16. 16.💪 Which force is at work: rubbing hands warms them? (a) magnetic force (b) muscular force (c) gravity (d) friction
17. 17.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
18. 18.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
19. 19.🏋️ Pushing a crate 9 m took 360 J of work. What force was used, in newtons?
20. 20.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
21. 21.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) True (b) False
22. 22.⚙️ Which simple machine is a crane hook block? (a) pulley (b) wedge (c) inclined plane (d) screw
23. 23.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
24. 24.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
25. 25.⚖️ A seesaw balances. Meena (160 N) sits 4 m from the pivot on one side; Kabir (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 12 N, a glass sheet 2 N, a wooden plank 5 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) a wooden plank
27. 27.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) cold (d) wet
28. 28.Which of these is caused by muscular force? (a) shoes grip the floor (b) pedalling a cycle (c) rubbing hands warms them (d) brakes stop a bicycle
29. 29.⚙️ Which simple machine is a nutcracker? (a) wheel and axle (b) screw (c) wedge (d) lever
30. 30.💪 A bag has a mass of 1 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
31. 31.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 40 cm and the load at 20 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
32. 32.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
33. 33.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
34. 34.⚖️ A seesaw balances. Arjun (170 N) sits 2 m from the pivot on one side; Kabir (340 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
35. 35.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
36. 36.⚖️ A seesaw balances. Arjun (480 N) sits ? m from the pivot on one side; Asha (480 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
37. 37.Which of these is caused by gravity? (a) a river flows downhill (b) lifting a school bag (c) a magnet picks up pins (d) a rolling ball slows
38. 38.⚙️ Which simple machine is a claw hammer on a nail? (a) wedge (b) lever (c) wheel and axle (d) pulley
39. 39.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the direction of pull (c) gravity (d) the size of the load
40. 40.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to grip the road (d) to save rubber

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