Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 690 · 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 is the odd one out? (a) a box pushed on carpet (b) a tyre with deep treads (c) a grippy rubber sole (d) skating on ice
2. 2.Which of these is caused by magnetic force? (a) a fridge magnet sticks (b) rain falls to the ground (c) an apple falls down (d) rubbing hands warms them
3. 3.⚖️ A seesaw balances. Arjun (240 N) sits ? m from the pivot on one side; Asha (240 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
4. 4.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
5. 5.Which of these is a wedge? (a) a seesaw (b) a road up a hill (c) a screw jack (d) an axe blade
6. 6.🪝 A well winch has a handle (wheel) of radius 2 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
7. 7.True or false: a movable pulley is on a flagpole top. (a) True (b) False
8. 8.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
9. 9.💪 Two children push a box to the right, one with 65 N and the other with 45 N. What is the net (total) force on the box, in newtons?
10. 10.⚖️ A seesaw balances. Zoya (? N) sits 1 m from the pivot on one side; Arjun (170 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
11. 11.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 1 (c) class 3
12. 12.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
13. 13.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
14. 14.Which of these is caused by magnetic force? (a) an apple falls down (b) a thrown ball comes down (c) a magnet picks up pins (d) pedalling a cycle
15. 15.⚖️ A seesaw balances. Arjun (320 N) sits 1 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?
16. 16.⚖️ A seesaw balances. Asha (570 N) sits 2 m from the pivot on one side; Zoya (380 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
17. 17.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
18. 18.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) farther from the pivot (c) anywhere (d) on the pivot
19. 19.⚖️ A lever bar balances. The load is 560 N at 40 cm from the fulcrum. The effort is 280 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
20. 20.⚙️ A screw is really … (a) a tiny pulley (b) a kind of wheel (c) a bent lever (d) a ramp wrapped round
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 2 N, a carpet 3 N, sandpaper 4 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
22. 22.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the load (c) the axle (d) the effort
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 20 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
24. 24.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
25. 25.🔍 Which is the odd one out? (a) a window blind cord (b) a road up a hill (c) a crane hook block (d) a well-bucket rope wheel
26. 26.True or false: a seesaw is a class 1 lever (fulcrum in the middle). (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) a bottle opener (b) a seesaw (c) a crowbar (d) a flagpole rope wheel
28. 28.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
29. 29.🏋️ A force of 220 N pushes a cart 5 m along the floor. How much work is done, in joules?
30. 30.💪 Which force is at work: squeezing a lemon? (a) magnetic force (b) friction (c) gravity (d) muscular force
31. 31.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 7 m, how many metres of rope must you pull?
32. 32.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
33. 33.True or false: a rough doormat gives less friction. (a) False (b) True
34. 34.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?
35. 35.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
36. 36.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
37. 37.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a smaller rod (axle) (c) a flat ramp (d) a sharp wedge
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 20 cm and the load at 80 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
39. 39.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) False (b) True
40. 40.💪 A cart is pulled to the right with 20 N and to the left with 25 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left

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