Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 654 · 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.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
2. 2.True or false: pulling a cart is a pull. (a) True (b) False
3. 3.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 3 (c) class 1
4. 4.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
5. 5.True or false: a pair of pliers is a class 3 lever (effort in the middle). (a) True (b) False
6. 6.Which of these is a wedge? (a) a nut and bolt (b) a wheelchair ramp (c) an axe blade (d) a screw jack
7. 7.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
8. 8.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
9. 9.Which of these is caused by magnetic force? (a) a rolling ball slows (b) a magnet picks up pins (c) a thrown ball comes down (d) brakes stop a bicycle
10. 10.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
11. 11.💪 Two children push a box to the right, one with 95 N and the other with 5 N. What is the net (total) force on the box, in newtons?
12. 12.💪 A force is a … (a) type of sound (b) unit of time (c) kind of colour (d) push or a pull
13. 13.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) press parts harder (c) add sand (d) make parts rough
14. 14.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 240 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
15. 15.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
16. 16.True or false: powder on a carrom board gives more friction. (a) True (b) False
17. 17.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 210 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
18. 18.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) polished marble (d) ice
19. 19.Which of these is caused by magnetic force? (a) rain falls to the ground (b) a rolling ball slows (c) a thrown ball comes down (d) a compass needle turns
20. 20.💪 Which force is at work: shoes grip the floor? (a) muscular force (b) magnetic force (c) friction (d) gravity
21. 21.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
22. 22.💪 Two children push a box to the right, one with 10 N and the other with 55 N. What is the net (total) force on the box, in newtons?
23. 23.🔍 Which is the odd one out? (a) a steering wheel (b) a round doorknob (c) a claw hammer on a nail (d) a well winch handle
24. 24.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
25. 25.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
26. 26.True or false: a fixed pulley rises with the load. (a) False (b) True
27. 27.🏋️ Pushing a crate 5 m took 600 J of work. What force was used, in newtons?
28. 28.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
29. 29.💪 Which force pulls everything towards the Earth? (a) gravity (b) magnetism (c) friction (d) wind
30. 30.True or false: a jar lid is a screw. (a) False (b) True
31. 31.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
32. 32.⚖️ A seesaw balances. Zoya (480 N) sits 2 m from the pivot on one side; Ravi (320 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
33. 33.🛞 Rubbing your hands fast makes them … (a) wet (b) cold (c) magnetic (d) warm
34. 34.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
35. 35.💪 Which force is at work: an apple falls down? (a) muscular force (b) gravity (c) friction (d) magnetic force
36. 36.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 1 (b) class 2 (c) class 3
37. 37.💪 Which force is at work: a magnet picks up pins? (a) muscular force (b) friction (c) magnetic force (d) gravity
38. 38.🪝 A bucket weighing 60 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
39. 39.True or false: a fixed pulley is on a flagpole top. (a) True (b) False
40. 40.💪 Which force is at work: a fridge magnet sticks? (a) muscular force (b) gravity (c) friction (d) magnetic force

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