Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 322 · 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 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
2. 2.⚖️ A seesaw balances. Kabir (? N) sits 2 m from the pivot on one side; Asha (200 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
3. 3.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
4. 4.Which of these is a wheel and axle? (a) a seesaw (b) a nut and bolt (c) a screw jack (d) a water tap handle
5. 5.🪝 A well winch has a handle (wheel) of radius 20 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
6. 6.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
7. 7.🔍 Which is the odd one out? (a) a playground slide (b) a seesaw (c) a claw hammer on a nail (d) a crowbar
8. 8.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
9. 9.⚖️ A seesaw balances. Ravi (100 N) sits 3 m from the pivot on one side; Arjun (300 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
10. 10.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
11. 11.Which of these is a screw? (a) a wheelchair ramp (b) a door stopper (c) a nut and bolt (d) a playground slide
12. 12.Which of these is an inclined plane? (a) a nutcracker (b) a playground slide (c) a well winch handle (d) the tip of a nail
13. 13.⚙️ A wedge is … (a) a rope on a wheel (b) a bar on a pivot (c) a wheel on a rod (d) two ramps back to back
14. 14.⚙️ Most simple machines make work easier by letting us … (a) use a smaller force (b) make new energy (c) switch off gravity (d) stop all friction
15. 15.💪 A bag has a mass of 53 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
16. 16.🪝 A well winch has a handle (wheel) of radius 9 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
17. 17.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
18. 18.True or false: a water tap handle is a screw. (a) True (b) False
19. 19.💪 Which force is at work: a compass needle turns? (a) gravity (b) muscular force (c) magnetic force (d) friction
20. 20.💪 Which force is at work: a river flows downhill? (a) friction (b) gravity (c) muscular force (d) magnetic force
21. 21.🏋️ Pushing a crate 8 m took 2960 J of work. What force was used, in newtons?
22. 22.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
23. 23.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 7 N, sandpaper 10 N, ice 1 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) ice (d) a carpet
25. 25.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 3 (b) class 2 (c) class 1
26. 26.🪝 A bucket weighing 150 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
27. 27.⚖️ A lever bar balances. The load is 160 N at ? cm from the fulcrum. The effort is 100 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
28. 28.True or false: skating on ice gives more friction. (a) False (b) True
29. 29.True or false: pushing a swing is a pull. (a) True (b) False
30. 30.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 1 (c) class 2
31. 31.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
32. 32.🔍 Which is the odd one out? (a) a well winch handle (b) a screw jack (c) a jar lid (d) a bottle cap
33. 33.⚖️ A seesaw balances. Ravi (570 N) sits 4 m from the pivot on one side; Kabir (760 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
34. 34.⚖️ A seesaw balances. Kabir (200 N) sits 1 m from the pivot on one side; Asha (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
35. 35.🛞 Friction acts … (a) with the motion (b) only on ice (c) against the motion (d) only upwards
36. 36.Which of these is a lever? (a) a well-bucket rope wheel (b) a bottle cap (c) a crowbar (d) a door stopper
37. 37.🔍 Which is the odd one out? (a) a window blind cord (b) a bottle opener (c) a seesaw (d) a claw hammer on a nail
38. 38.💪 Which force is at work: squeezing a lemon? (a) gravity (b) magnetic force (c) friction (d) muscular force
39. 39.True or false: a box pushed on carpet gives more friction. (a) False (b) True
40. 40.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push

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