Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 665 · 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.💪 A box weighs 500 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 4 N, a carpet 7 N, sandpaper 11 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) ice
3. 3.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wheel on ball bearings (c) a wet tiled floor (d) powder on a carrom board
4. 4.⚖️ A seesaw balances. Asha (? N) sits 3 m from the pivot on one side; Meena (450 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
5. 5.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
6. 6.True or false: a tyre with deep treads gives less friction. (a) True (b) False
7. 7.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
8. 8.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) skating on ice (c) a tyre with deep treads (d) powder on a carrom board
9. 9.💪 A force is a … (a) type of sound (b) push or a pull (c) unit of time (d) kind of colour
10. 10.🏋️ A force of 340 N pushes a cart 4 m along the floor. How much work is done, in joules?
11. 11.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
12. 12.🏋️ A force of 380 N pushes a cart 2 m along the floor. How much work is done, in joules?
13. 13.True or false: a crane hook block is a wedge. (a) True (b) False
14. 14.⚖️ Which class of lever is a wheelbarrow? (a) class 1 (b) class 3 (c) class 2
15. 15.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
16. 16.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
17. 17.True or false: the tip of a nail is a wedge. (a) False (b) True
18. 18.💪 A bag has a mass of 1 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
19. 19.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 210 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
20. 20.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
21. 21.True or false: a fixed pulley rises with the load. (a) True (b) False
22. 22.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) closer to the pivot (d) on the pivot
23. 23.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
24. 24.⚙️ Which simple machine is a knife edge? (a) wedge (b) inclined plane (c) screw (d) pulley
25. 25.⚖️ A lever bar balances. The load is 240 N at ? cm from the fulcrum. The effort is 200 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
26. 26.🪝 A pulley system lifts a 500 N load with an effort of 250 N. What is its mechanical advantage (MA)?
27. 27.💪 Which can a force NOT do? (a) change its shape (b) stop it moving (c) change its colour (d) start it moving
28. 28.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
29. 29.🪝 A well winch has a handle (wheel) of radius 28 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
30. 30.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
31. 31.⚖️ Which class of lever is a nutcracker? (a) class 1 (b) class 2 (c) class 3
32. 32.⚖️ A seesaw balances. Asha (680 N) sits 1 m from the pivot on one side; Ravi (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
33. 33.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 10 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
34. 34.⚙️ Which simple machine is a crane hook block? (a) screw (b) pulley (c) lever (d) wheel and axle
35. 35.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
36. 36.🏋️ A force of 320 N did 2560 J of work. How many metres did the object move?
37. 37.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
38. 38.⚖️ Turning effect = force × … (a) time taken (b) distance from fulcrum (c) mass of fulcrum (d) colour of bar
39. 39.⚖️ A seesaw balances. Asha (480 N) sits ? m from the pivot on one side; Kabir (480 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
40. 40.🛞 Rubbing your hands fast makes them … (a) wet (b) cold (c) magnetic (d) warm

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