Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 209 · 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.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) ice (c) glass (d) sandpaper
2. 2.True or false: a steering wheel is a screw. (a) True (b) False
3. 3.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
4. 4.🏋️ A force of 100 N pushes a cart 6 m along the floor. How much work is done, in joules?
5. 5.⚙️ Which simple machine is a well-bucket rope wheel? (a) inclined plane (b) pulley (c) wheel and axle (d) lever
6. 6.💪 A bag has a mass of 50 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
7. 7.⚖️ A lever bar balances. The load is 100 N at ? cm from the fulcrum. The effort is 20 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
8. 8.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 1 (c) class 2
9. 9.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
10. 10.⚖️ A lever balances when … (a) both weights are equal (b) the bar is short (c) turning effects match (d) the fulcrum moves
11. 11.True or false: a fixed pulley only changes direction. (a) False (b) True
12. 12.⚙️ Which simple machine is a nut and bolt? (a) pulley (b) lever (c) wedge (d) screw
13. 13.🪝 More rope sections holding a load means … (a) the load floats (b) less effort needed (c) more effort needed (d) no change
14. 14.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
15. 15.⚖️ In a class 3 lever, what is in the middle? (a) the load (b) the pulley (c) the fulcrum (d) the effort
16. 16.💪 A bag has a mass of 31 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
17. 17.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
18. 18.🪝 A pulley system lifts a 1160 N load with an effort of 290 N. What is its mechanical advantage (MA)?
19. 19.⚖️ Which class of lever is a pair of tweezers? (a) class 2 (b) class 1 (c) class 3
20. 20.💪 Which force is at work: pedalling a cycle? (a) friction (b) muscular force (c) gravity (d) magnetic force
21. 21.True or false: a rough doormat gives less friction. (a) False (b) True
22. 22.True or false: a beam balance is a class 2 lever (load in the middle). (a) False (b) True
23. 23.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to go slower (c) to look nice (d) to grip the road
24. 24.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
25. 25.🏋️ Pushing a crate 10 m took 4400 J of work. What force was used, in newtons?
26. 26.⚖️ A seesaw balances. Ravi (640 N) sits ? m from the pivot on one side; Kabir (640 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
27. 27.⚙️ Which simple machine is a playground slide? (a) wedge (b) lever (c) inclined plane (d) wheel and axle
28. 28.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
29. 29.🔍 Which is the odd one out? (a) chalk on a gym bar (b) sand on a slippery path (c) powder on a carrom board (d) a rough doormat
30. 30.True or false: oil on a squeaky hinge gives less friction. (a) True (b) False
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 3 N, a glass sheet 4 N, a carpet 6 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
32. 32.💪 A bag has a mass of 49 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
33. 33.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
34. 34.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
35. 35.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) on the pivot (d) closer to the pivot
36. 36.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
37. 37.⚖️ Which class of lever is your forearm? (a) class 2 (b) class 1 (c) class 3
38. 38.True or false: a tyre with deep treads gives more friction. (a) True (b) False
39. 39.True or false: a tug of war is a push. (a) True (b) False
40. 40.Which of these is caused by muscular force? (a) pedalling a cycle (b) a fridge magnet sticks (c) a compass needle turns (d) a magnet picks up pins

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