Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 548 · 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 friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
2. 2.🔍 Which is the odd one out? (a) a wet tiled floor (b) a wheel on ball bearings (c) skating on ice (d) sand on a slippery path
3. 3.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
4. 4.⚖️ Turning effect = force × … (a) time taken (b) mass of fulcrum (c) distance from fulcrum (d) colour of bar
5. 5.⚖️ A seesaw balances. Asha (570 N) sits ? m from the pivot on one side; Meena (190 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
6. 6.🛞 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 7 N, a carpet 11 N. How many newtons more were needed on sandpaper than on ice?
7. 7.True or false: a window blind cord is a pulley. (a) True (b) False
8. 8.True or false: a tyre with deep treads gives more friction. (a) True (b) False
9. 9.⚖️ A seesaw balances. Asha (170 N) sits ? m from the pivot on one side; Ravi (170 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
10. 10.True or false: a box pushed on carpet gives more friction. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) a road up a hill (b) a truck loading ramp (c) a bottle cap (d) a playground slide
12. 12.🏋️ A force of 320 N did 2880 J of work. How many metres did the object move?
13. 13.🏋️ A force of 250 N pushes a cart 4 m along the floor. How much work is done, in joules?
14. 14.True or false: a nutcracker is a lever. (a) True (b) False
15. 15.True or false: a wheelbarrow is a class 1 lever (fulcrum in the middle). (a) True (b) False
16. 16.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
17. 17.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 80 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
18. 18.🛞 Friction acts … (a) with the motion (b) only on ice (c) only upwards (d) against the motion
19. 19.🔍 Which is the odd one out? (a) a water tap handle (b) the tip of a nail (c) a chisel (d) a knife edge
20. 20.True or false: a well-bucket rope wheel is a pulley. (a) True (b) False
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, a glass sheet 1 N, a wooden plank 2 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) a wooden plank
22. 22.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
23. 23.Which of these is caused by friction? (a) pedalling a cycle (b) a fridge magnet sticks (c) brakes stop a bicycle (d) a thrown ball comes down
24. 24.💪 A box weighs 600 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
25. 25.⚖️ A seesaw balances. Ravi (110 N) sits 4 m from the pivot on one side; Arjun (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
26. 26.True or false: a wet tiled floor gives more friction. (a) False (b) True
27. 27.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
28. 28.🔍 Which is the odd one out? (a) a rough doormat (b) a wheel on ball bearings (c) a box pushed on carpet (d) chalk on a gym bar
29. 29.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to go slower (c) to look nice (d) to grip the road
30. 30.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) balanced (c) doubled (d) unbalanced
31. 31.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
32. 32.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a tyre with deep treads (c) skating on ice (d) a box pushed on carpet
33. 33.True or false: closing a drawer is a pull. (a) True (b) False
34. 34.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a sharp wedge (c) a smaller rod (axle) (d) a flat ramp
35. 35.🔍 Which is the odd one out? (a) a crane hook block (b) a jar lid (c) a well-bucket rope wheel (d) a flagpole rope wheel
36. 36.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 60 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
37. 37.⚖️ A lever bar balances. The load is 540 N at ? cm from the fulcrum. The effort is 180 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
38. 38.True or false: pulling up your socks is a push. (a) False (b) True
39. 39.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
40. 40.⚖️ A seesaw balances. Zoya (440 N) sits ? m from the pivot on one side; Kabir (440 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?

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