Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 650 · 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.⚖️ Turning effect = force × … (a) colour of bar (b) time taken (c) distance from fulcrum (d) mass of fulcrum
2. 2.🏋️ Pushing a crate 7 m took 1120 J of work. What force was used, in newtons?
3. 3.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
4. 4.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the effort (c) the fulcrum (d) the load
5. 5.Which of these is caused by magnetic force? (a) a thrown ball comes down (b) squeezing a lemon (c) brakes stop a bicycle (d) a fridge magnet sticks
6. 6.⚖️ A lever balances when … (a) both weights are equal (b) turning effects match (c) the bar is short (d) the fulcrum moves
7. 7.⚖️ Which class of lever is a bottle opener? (a) class 2 (b) class 3 (c) class 1
8. 8.True or false: opening a drawer is a push. (a) False (b) True
9. 9.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
10. 10.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
11. 11.⚖️ Which class of lever is a pair of tweezers? (a) class 2 (b) class 3 (c) class 1
12. 12.🔍 Which is the odd one out? (a) a knife edge (b) a bottle cap (c) a chisel (d) a door stopper
13. 13.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
14. 14.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) closer to the pivot (c) farther from the pivot (d) on the pivot
15. 15.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the colour of rope (d) the direction of pull
16. 16.⚖️ A lever bar balances. The load is 200 N at 40 cm from the fulcrum. The effort is ? N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
17. 17.🔍 Which is the odd one out? (a) a water tap handle (b) a round doorknob (c) a knife edge (d) a well winch handle
18. 18.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
19. 19.🛞 Rubbing your hands fast makes them … (a) cold (b) wet (c) warm (d) magnetic
20. 20.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 200 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
22. 22.True or false: skating on ice gives less friction. (a) False (b) True
23. 23.🪝 A well winch has a handle (wheel) of radius 3 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 12 N, a glass sheet 3 N, a wooden plank 6 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) a carpet
25. 25.True or false: a steering wheel is a wedge. (a) False (b) True
26. 26.💪 Which force is at work: brakes stop a bicycle? (a) gravity (b) muscular force (c) magnetic force (d) friction
27. 27.⚙️ A screw is really … (a) a bent lever (b) a tiny pulley (c) a kind of wheel (d) a ramp wrapped round
28. 28.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
29. 29.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
30. 30.⚖️ A seesaw balances. Asha (110 N) sits 4 m from the pivot on one side; Kabir (440 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
31. 31.Which of these is caused by muscular force? (a) rubbing hands warms them (b) squeezing a lemon (c) a compass needle turns (d) brakes stop a bicycle
32. 32.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
33. 33.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 3 (b) class 1 (c) class 2
34. 34.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
35. 35.⚖️ A seesaw balances. Meena (130 N) sits 1 m from the pivot on one side; Arjun (130 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
36. 36.🏋️ A force of 100 N did 600 J of work. How many metres did the object move?
37. 37.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the load (c) nothing (d) the fulcrum
38. 38.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
39. 39.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 3 (c) 12 (d) 6
40. 40.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction

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