Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 7 · 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.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
2. 2.Which of these is a lever? (a) a crowbar (b) a well-bucket rope wheel (c) a screw jack (d) a wheelchair ramp
3. 3.⚖️ A lever bar balances. The load is 150 N at 30 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
4. 4.⚖️ A seesaw balances. Arjun (130 N) sits ? m from the pivot on one side; Asha (130 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
5. 5.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a crane hook block (c) a window blind cord (d) a round doorknob
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 5 N, sandpaper 9 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
7. 7.⚖️ A seesaw balances. Kabir (420 N) sits 1 m from the pivot on one side; Zoya (140 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
8. 8.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
9. 9.💪 A force is a … (a) type of sound (b) kind of colour (c) unit of time (d) push or a pull
10. 10.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
11. 11.True or false: a crowbar is a wheel and axle. (a) False (b) True
12. 12.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 20 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
13. 13.💪 A box weighs 490 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
14. 14.⚖️ A lever bar balances. The load is 810 N at 30 cm from the fulcrum. The effort is 270 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
15. 15.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 2 (c) class 3
16. 16.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
17. 17.True or false: a rough doormat gives more friction. (a) True (b) False
18. 18.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
19. 19.Which of these is a wheel and axle? (a) a wheelchair ramp (b) a wood screw (c) a steering wheel (d) a seesaw
20. 20.True or false: pushing a trolley is a pull. (a) True (b) False
21. 21.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
22. 22.⚖️ A seesaw balances. Ravi (300 N) sits 3 m from the pivot on one side; Meena (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
23. 23.True or false: a movable pulley halves the effort. (a) True (b) False
24. 24.🏋️ Pushing a crate 1 m took 170 J of work. What force was used, in newtons?
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 1 N, a wooden plank 2 N, a carpet 6 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
26. 26.True or false: a seesaw is a wedge. (a) True (b) False
27. 27.💪 In which unit do we measure force? (a) litre (L) (b) second (s) (c) metre (m) (d) newton (N)
28. 28.True or false: kicking a football is a pull. (a) False (b) True
29. 29.💪 Which force is at work: a thrown ball comes down? (a) gravity (b) friction (c) magnetic force (d) muscular force
30. 30.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
31. 31.Which of these is a pulley? (a) a crowbar (b) a seesaw (c) a claw hammer on a nail (d) a flagpole rope wheel
32. 32.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) switch off gravity (c) stop all friction (d) use a smaller force
33. 33.💪 Which can a force NOT do? (a) stop it moving (b) change its shape (c) start it moving (d) change its colour
34. 34.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 10 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
35. 35.Which of these is caused by magnetic force? (a) a thrown ball comes down (b) rubbing hands warms them (c) a compass needle turns (d) a river flows downhill
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 4 N, a carpet 5 N, sandpaper 6 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a carpet (d) sandpaper
37. 37.⚖️ A lever bar balances. The load is 90 N at ? cm from the fulcrum. The effort is 10 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
38. 38.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
39. 39.🏋️ A force of 80 N pushes a cart 6 m along the floor. How much work is done, in joules?
40. 40.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley

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