Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 58 · 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 140 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
2. 2.🔍 Which is the odd one out? (a) a steering wheel (b) a water tap handle (c) a flagpole rope wheel (d) a round doorknob
3. 3.⚖️ A seesaw balances. Arjun (? N) sits 3 m from the pivot on one side; Kabir (540 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.🪝 A well winch has a handle (wheel) of radius 10 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
5. 5.💪 A force is a … (a) type of sound (b) kind of colour (c) push or a pull (d) unit of time
6. 6.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
7. 7.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 12 (c) 3 (d) 6
8. 8.Which of these is caused by magnetic force? (a) a thrown ball comes down (b) pedalling a cycle (c) rain falls to the ground (d) a magnet picks up pins
9. 9.Which of these is a screw? (a) a nutcracker (b) a nut and bolt (c) a bottle opener (d) a playground slide
10. 10.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
11. 11.True or false: a crowbar is a class 3 lever (effort in the middle). (a) False (b) True
12. 12.🛞 Rubbing your hands fast makes them … (a) warm (b) cold (c) wet (d) magnetic
13. 13.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 120 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
14. 14.⚙️ Which simple machine is a screw jack? (a) inclined plane (b) lever (c) wheel and axle (d) screw
15. 15.True or false: a bottle opener is a class 2 lever (load in the middle). (a) False (b) True
16. 16.True or false: a box pushed on carpet gives more friction. (a) False (b) True
17. 17.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
18. 18.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
19. 19.True or false: pushing a swing is a pull. (a) False (b) True
20. 20.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 20 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
21. 21.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) a wet tiled floor (d) a smooth steel slide
22. 22.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
23. 23.💪 In which unit do we measure force? (a) newton (N) (b) metre (m) (c) second (s) (d) litre (L)
24. 24.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
25. 25.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 40 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
26. 26.True or false: chalk on a gym bar gives less friction. (a) True (b) False
27. 27.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 1 (c) class 3
28. 28.🔍 Which is the odd one out? (a) a smooth steel slide (b) chalk on a gym bar (c) a tyre with deep treads (d) a rough doormat
29. 29.True or false: a pair of tweezers is a class 3 lever (effort in the middle). (a) False (b) True
30. 30.Which of these is caused by friction? (a) a thrown ball comes down (b) a fridge magnet sticks (c) brakes stop a bicycle (d) lifting a school bag
31. 31.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
32. 32.Which of these is a wheel and axle? (a) a claw hammer on a nail (b) a well-bucket rope wheel (c) an axe blade (d) a steering wheel
33. 33.⚖️ Turning effect = force × … (a) distance from fulcrum (b) colour of bar (c) time taken (d) mass of fulcrum
34. 34.⚙️ A wedge is … (a) a rope on a wheel (b) two ramps back to back (c) a bar on a pivot (d) a wheel on a rod
35. 35.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
36. 36.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 80 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
37. 37.Which of these is a pulley? (a) a bottle cap (b) a door stopper (c) a well-bucket rope wheel (d) a wood screw
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
39. 39.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
40. 40.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to save rubber (d) to grip the road

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