Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 967 · 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.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
2. 2.True or false: pulling up your socks is a push. (a) True (b) False
3. 3.Which of these is caused by gravity? (a) a rolling ball slows (b) pedalling a cycle (c) brakes stop a bicycle (d) an apple falls down
4. 4.⚖️ A seesaw balances. Kabir (220 N) sits 4 m from the pivot on one side; Ravi (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
5. 5.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) on the pivot (c) closer to the pivot (d) anywhere
6. 6.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
7. 7.🛞 How can we reduce friction in a machine? (a) make parts rough (b) oil the moving parts (c) press parts harder (d) add sand
8. 8.True or false: an axe blade is an inclined plane. (a) True (b) False
9. 9.True or false: a nut and bolt is a lever. (a) False (b) True
10. 10.⚖️ A lever bar balances. The load is 400 N at 10 cm from the fulcrum. The effort is ? N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
11. 11.🏋️ A force of 400 N pushes a cart 8 m along the floor. How much work is done, in joules?
12. 12.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) a door stopper (b) a steering wheel (c) a chisel (d) a knife edge
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a carpet 6 N, sandpaper 10 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
15. 15.💪 Which force is at work: a fridge magnet sticks? (a) muscular force (b) friction (c) magnetic force (d) gravity
16. 16.True or false: pushing a trolley is a pull. (a) False (b) True
17. 17.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
18. 18.🏋️ A force of 380 N pushes a cart 8 m along the floor. How much work is done, in joules?
19. 19.🔍 Which is the odd one out? (a) a knife edge (b) an axe blade (c) a water tap handle (d) the tip of a nail
20. 20.⚖️ A lever bar balances. The load is 560 N at 40 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) True (b) False
22. 22.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
23. 23.True or false: closing a drawer is a push. (a) True (b) False
24. 24.⚙️ Which simple machine is an axe blade? (a) pulley (b) lever (c) inclined plane (d) wedge
25. 25.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
26. 26.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
27. 27.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Meena (170 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
28. 28.True or false: a lemon squeezer is a class 3 lever (effort in the middle). (a) False (b) True
29. 29.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 6 N, ice 2 N, a glass sheet 3 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) ice
31. 31.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
32. 32.🔍 Which is the odd one out? (a) a smooth steel slide (b) skating on ice (c) a wheel on ball bearings (d) a grippy rubber sole
33. 33.💪 A cart is pulled to the right with 40 N and to the left with 45 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
34. 34.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
35. 35.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 40 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
36. 36.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
37. 37.Which of these is caused by muscular force? (a) pedalling a cycle (b) a compass needle turns (c) a rolling ball slows (d) an apple falls down
38. 38.True or false: kicking a football is a pull. (a) False (b) True
39. 39.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 3 (b) class 1 (c) class 2
40. 40.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)

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