Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 566 · 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.⚖️ A seesaw balances. Zoya (110 N) sits 1 m from the pivot on one side; Asha (110 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 4 N, a carpet 6 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
3. 3.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
4. 4.⚖️ A seesaw balances. Arjun (180 N) sits 1 m from the pivot on one side; Ravi (180 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
5. 5.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the bar is short (d) the fulcrum moves
6. 6.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
7. 7.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to go slower (c) to look nice (d) to grip the road
8. 8.⚖️ Which class of lever is your forearm? (a) class 2 (b) class 1 (c) class 3
9. 9.🛞 How can we reduce friction in a machine? (a) make parts rough (b) press parts harder (c) add sand (d) oil the moving parts
10. 10.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
11. 11.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 10 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
12. 12.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
13. 13.True or false: a wheelbarrow is a class 1 lever (fulcrum in the middle). (a) False (b) True
14. 14.💪 Which force pulls everything towards the Earth? (a) magnetism (b) wind (c) friction (d) gravity
15. 15.💪 Which force is at work: shoes grip the floor? (a) muscular force (b) gravity (c) magnetic force (d) friction
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 10 N, ice 1 N, a glass sheet 2 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) ice (d) a glass sheet
17. 17.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
18. 18.🏋️ Pushing a crate 9 m took 2880 J of work. What force was used, in newtons?
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, ice 4 N, a wooden plank 6 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
20. 20.Which of these is a lever? (a) a water tap handle (b) a bottle opener (c) a wood screw (d) a chisel
21. 21.⚖️ A lever bar balances. The load is 400 N at 40 cm from the fulcrum. The effort is 200 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
22. 22.🏋️ Pushing a crate 5 m took 2050 J of work. What force was used, in newtons?
23. 23.⚖️ A seesaw balances. Asha (160 N) sits ? m from the pivot on one side; Arjun (480 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
24. 24.🔍 Which is the odd one out? (a) a jar lid (b) a nut and bolt (c) a wood screw (d) a seesaw
25. 25.⚙️ Most simple machines make work easier by letting us … (a) use a smaller force (b) stop all friction (c) make new energy (d) switch off gravity
26. 26.Which of these is caused by magnetic force? (a) lifting a school bag (b) a fridge magnet sticks (c) rain falls to the ground (d) an apple falls down
27. 27.⚙️ Which simple machine is a knife edge? (a) wheel and axle (b) screw (c) wedge (d) pulley
28. 28.True or false: a movable pulley stays in one place. (a) True (b) False
29. 29.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
30. 30.⚙️ Which simple machine is a door stopper? (a) lever (b) wedge (c) pulley (d) screw
31. 31.True or false: pushing a swing is a pull. (a) False (b) True
32. 32.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 11 N, ice 4 N, a glass sheet 6 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a glass sheet
34. 34.⚖️ 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 3 (b) class 2 (c) class 1
35. 35.⚙️ Which simple machine is a water tap handle? (a) lever (b) pulley (c) inclined plane (d) wheel and axle
36. 36.True or false: a fixed pulley halves the effort. (a) False (b) True
37. 37.💪 A cart is pulled to the right with 25 N and to the left with 15 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
38. 38.Which of these is a pulley? (a) a chisel (b) a knife edge (c) a steering wheel (d) a flagpole rope wheel
39. 39.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
40. 40.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull

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