Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 360 · 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) oil on a squeaky hinge (b) a wet tiled floor (c) skating on ice (d) a tyre with deep treads
2. 2.⚙️ Which simple machine is a bottle opener? (a) wheel and axle (b) screw (c) pulley (d) lever
3. 3.True or false: a fixed pulley rises with the load. (a) True (b) False
4. 4.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
5. 5.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
6. 6.⚖️ A seesaw balances. Arjun (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?
7. 7.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
8. 8.🪝 A well winch has a handle (wheel) of radius 9 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
9. 9.💪 A box weighs 480 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
10. 10.💪 Which force is at work: rain falls to the ground? (a) muscular force (b) gravity (c) friction (d) magnetic force
11. 11.Which of these is caused by gravity? (a) a rolling ball slows (b) brakes stop a bicycle (c) a thrown ball comes down (d) a fridge magnet sticks
12. 12.🏋️ A force of 40 N pushes a cart 6 m along the floor. How much work is done, in joules?
13. 13.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
14. 14.⚖️ Which class of lever is a crowbar? (a) class 3 (b) class 1 (c) class 2
15. 15.True or false: a pair of pliers is a class 2 lever (load in the middle). (a) True (b) False
16. 16.🪝 A well winch has a handle (wheel) of radius 5 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
17. 17.Which of these is caused by gravity? (a) shoes grip the floor (b) a river flows downhill (c) rubbing hands warms them (d) lifting a school bag
18. 18.💪 Which force is at work: lifting a school bag? (a) friction (b) muscular force (c) magnetic force (d) gravity
19. 19.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
20. 20.🛞 Rubbing your hands fast makes them … (a) warm (b) magnetic (c) cold (d) wet
21. 21.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) anywhere (c) farther from the pivot (d) closer to the pivot
22. 22.True or false: pushing a swing is a push. (a) False (b) True
23. 23.True or false: a fixed pulley needs effort = load. (a) True (b) False
24. 24.True or false: a seesaw is a screw. (a) False (b) True
25. 25.🪝 A pulley system lifts a 1040 N load with an effort of 260 N. What is its mechanical advantage (MA)?
26. 26.🪝 A bucket weighing 300 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
27. 27.🪝 A bucket weighing 40 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
28. 28.True or false: a truck loading ramp is an inclined plane. (a) False (b) True
29. 29.🪝 A pulley system lifts a 420 N load with an effort of 210 N. What is its mechanical advantage (MA)?
30. 30.⚖️ What is the pivot point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 5 N, a carpet 6 N, sandpaper 9 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) ice (d) a wooden plank
32. 32.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
33. 33.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
34. 34.⚖️ Which class of lever is a fishing rod? (a) class 3 (b) class 1 (c) class 2
35. 35.⚖️ A seesaw balances. Kabir (? N) sits 3 m from the pivot on one side; Arjun (330 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 1 (c) class 3
37. 37.🪝 A well winch has a handle (wheel) of radius 30 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
38. 38.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to look nice (c) to go slower (d) to save rubber
39. 39.⚙️ Which simple machine is a jar lid? (a) inclined plane (b) wedge (c) lever (d) screw
40. 40.🔍 Which is the odd one out? (a) skating on ice (b) a tyre with deep treads (c) chalk on a gym bar (d) a rough doormat

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