Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 159 · 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.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
2. 2.Which of these is a lever? (a) an axe blade (b) a truck loading ramp (c) a bottle opener (d) a bottle cap
3. 3.⚖️ A seesaw balances. Meena (680 N) sits ? m from the pivot on one side; Zoya (170 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
4. 4.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 3 N, a glass sheet 6 N, a carpet 9 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) sandpaper (d) a carpet
6. 6.💪 Which force is at work: a river flows downhill? (a) magnetic force (b) gravity (c) friction (d) muscular force
7. 7.🏋️ Pushing a crate 9 m took 1080 J of work. What force was used, in newtons?
8. 8.💪 A box weighs 570 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
9. 9.🔍 Which is the odd one out? (a) a smooth steel slide (b) a grippy rubber sole (c) a rough doormat (d) sand on a slippery path
10. 10.True or false: powder on a carrom board gives more friction. (a) True (b) False
11. 11.True or false: pulling a cart is a pull. (a) False (b) True
12. 12.⚖️ A lever balances when … (a) turning effects match (b) the fulcrum moves (c) the bar is short (d) both weights are equal
13. 13.Which of these is a screw? (a) a screw jack (b) a seesaw (c) a well winch handle (d) a bottle opener
14. 14.True or false: plucking a mango is a push. (a) False (b) True
15. 15.Which of these is caused by magnetic force? (a) a thrown ball comes down (b) rain falls to the ground (c) a magnet picks up pins (d) lifting a school bag
16. 16.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
17. 17.🪝 More rope sections holding a load means … (a) no change (b) more effort needed (c) the load floats (d) less effort needed
18. 18.True or false: pushing a swing is a pull. (a) True (b) False
19. 19.True or false: a movable pulley only changes direction. (a) False (b) True
20. 20.⚖️ A lever bar balances. The load is 400 N at ? cm from the fulcrum. The effort is 200 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) anywhere (c) farther from the pivot (d) on the pivot
22. 22.🪝 A well winch has a handle (wheel) of radius 20 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 20 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
24. 24.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
25. 25.💪 Which can a force NOT do? (a) change its colour (b) start it moving (c) stop it moving (d) change its shape
26. 26.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 20 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
27. 27.⚙️ Which simple machine is a round doorknob? (a) pulley (b) screw (c) wheel and axle (d) inclined plane
28. 28.⚖️ A lever bar balances. The load is 40 N at 30 cm from the fulcrum. The effort is 60 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
29. 29.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
30. 30.⚖️ A seesaw balances. Meena (160 N) sits ? m from the pivot on one side; Asha (160 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
31. 31.⚖️ A lever bar balances. The load is 280 N at 50 cm from the fulcrum. The effort is ? N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
32. 32.True or false: a tug of war is a pull. (a) True (b) False
33. 33.True or false: a beam balance is a class 3 lever (effort in the middle). (a) True (b) False
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, ice 3 N, a glass sheet 4 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) sandpaper
35. 35.🏋️ A force of 410 N pushes a cart 8 m along the floor. How much work is done, in joules?
36. 36.🏋️ A force of 410 N pushes a cart 10 m along the floor. How much work is done, in joules?
37. 37.True or false: the tip of a nail is a pulley. (a) True (b) False
38. 38.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the fulcrum (c) on the rock (d) far from the fulcrum
39. 39.True or false: closing a drawer is a push. (a) True (b) False
40. 40.⚖️ A seesaw balances. Asha (390 N) sits 3 m from the pivot on one side; Arjun (390 N) sits ? m from the pivot on the other side. What is the missing distance in metres?

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