Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 692 · 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 force is a … (a) type of sound (b) kind of colour (c) push or a pull (d) unit of time
2. 2.True or false: a truck loading ramp is an inclined plane. (a) False (b) True
3. 3.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) balanced (c) doubled (d) gravity
4. 4.Which of these is caused by magnetic force? (a) a magnet picks up pins (b) lifting a school bag (c) a thrown ball comes down (d) pedalling a cycle
5. 5.⚙️ A screw is really … (a) a tiny pulley (b) a kind of wheel (c) a ramp wrapped round (d) a bent lever
6. 6.True or false: a tyre with deep treads gives less friction. (a) False (b) True
7. 7.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
8. 8.True or false: pressing a doorbell is a push. (a) True (b) False
9. 9.⚙️ Which simple machine is a claw hammer on a nail? (a) pulley (b) wheel and axle (c) lever (d) screw
10. 10.⚖️ A lever bar balances. The load is 100 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?
11. 11.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
12. 12.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the effort (c) the load (d) the fulcrum
13. 13.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
14. 14.⚙️ Which simple machine is the tip of a nail? (a) wedge (b) screw (c) wheel and axle (d) lever
15. 15.💪 Which force is at work: a compass needle turns? (a) magnetic force (b) muscular force (c) gravity (d) friction
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 0 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
17. 17.💪 A box weighs 250 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
18. 18.💪 Which force pulls everything towards the Earth? (a) magnetism (b) friction (c) wind (d) gravity
19. 19.🏋️ A force of 470 N pushes a cart 8 m along the floor. How much work is done, in joules?
20. 20.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
21. 21.🔍 Which is the odd one out? (a) an axe blade (b) a bottle cap (c) a nut and bolt (d) a jar lid
22. 22.💪 Which can a force NOT do? (a) change its shape (b) start it moving (c) stop it moving (d) change its colour
23. 23.🔍 Which is the odd one out? (a) powder on a carrom board (b) oil on a squeaky hinge (c) a box pushed on carpet (d) a wheel on ball bearings
24. 24.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) closer to the pivot (c) anywhere (d) farther from the pivot
25. 25.True or false: a beam balance is a class 1 lever (fulcrum in the middle). (a) False (b) True
26. 26.Which of these is a wheel and axle? (a) a water tap handle (b) a well-bucket rope wheel (c) a road up a hill (d) a nutcracker
27. 27.Which of these is a screw? (a) a screw jack (b) a well winch handle (c) a flagpole rope wheel (d) a water tap handle
28. 28.True or false: a movable pulley only changes direction. (a) True (b) False
29. 29.🏋️ Pushing a crate 8 m took 1440 J of work. What force was used, in newtons?
30. 30.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
31. 31.Which of these is caused by magnetic force? (a) shoes grip the floor (b) a river flows downhill (c) rain falls to the ground (d) a compass needle turns
32. 32.💪 Which force is at work: rubbing hands warms them? (a) muscular force (b) friction (c) gravity (d) magnetic force
33. 33.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
34. 34.🛞 Rubbing your hands fast makes them … (a) wet (b) magnetic (c) warm (d) cold
35. 35.⚖️ A lever balances when … (a) turning effects match (b) the fulcrum moves (c) the bar is short (d) both weights are equal
36. 36.🪝 A bucket weighing 320 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
37. 37.True or false: a movable pulley halves the effort. (a) True (b) False
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 30 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
39. 39.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
40. 40.⚖️ A lever bar balances. The load is 320 N at 30 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?

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