Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 916 · 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.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
2. 2.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wheel on ball bearings (c) chalk on a gym bar (d) oil on a squeaky hinge
3. 3.⚖️ A lever balances when … (a) the bar is short (b) both weights are equal (c) turning effects match (d) the fulcrum moves
4. 4.💪 Which force is at work: brakes stop a bicycle? (a) muscular force (b) gravity (c) friction (d) magnetic force
5. 5.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 300 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
6. 6.⚙️ A screw is really … (a) a tiny pulley (b) a ramp wrapped round (c) a bent lever (d) a kind of wheel
7. 7.True or false: a fixed pulley only changes direction. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) a crowbar (b) a bottle opener (c) a claw hammer on a nail (d) a steering wheel
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
10. 10.🛞 Friction acts … (a) only on ice (b) with the motion (c) against the motion (d) only upwards
11. 11.True or false: a movable pulley makes you pull 2× rope. (a) True (b) False
12. 12.🪝 A well winch has a handle (wheel) of radius 18 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
13. 13.True or false: a pair of pliers is a class 3 lever (effort in the middle). (a) True (b) False
14. 14.💪 A force is a … (a) push or a pull (b) unit of time (c) kind of colour (d) type of sound
15. 15.True or false: a smooth steel slide gives more friction. (a) True (b) False
16. 16.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to save rubber (d) to grip the road
17. 17.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
18. 18.⚖️ Which class of lever is a crowbar? (a) class 3 (b) class 1 (c) class 2
19. 19.True or false: a road up a hill is an inclined plane. (a) False (b) True
20. 20.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
21. 21.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
22. 22.⚖️ A seesaw balances. Arjun (480 N) sits 1 m from the pivot on one side; Asha (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
23. 23.⚖️ Which class of lever is a beam balance? (a) class 2 (b) class 1 (c) class 3
24. 24.⚖️ 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
25. 25.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
26. 26.⚖️ A lever bar balances. The load is 270 N at 40 cm from the fulcrum. The effort is 360 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
27. 27.True or false: a wheelchair ramp is an inclined plane. (a) True (b) False
28. 28.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
29. 29.⚙️ Which simple machine is a well-bucket rope wheel? (a) wheel and axle (b) inclined plane (c) lever (d) pulley
30. 30.True or false: a tyre with deep treads gives more friction. (a) True (b) False
31. 31.⚖️ A lever bar balances. The load is 560 N at 10 cm from the fulcrum. The effort is ? N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
32. 32.True or false: a grippy rubber sole gives less friction. (a) False (b) True
33. 33.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
34. 34.💪 A cart is pulled to the right with 45 N and to the left with 45 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
35. 35.🏋️ A force of 270 N did 810 J of work. How many metres did the object move?
36. 36.True or false: oil on a squeaky hinge gives less friction. (a) True (b) False
37. 37.💪 Which can a force NOT do? (a) stop it moving (b) change its shape (c) start it moving (d) change its colour
38. 38.⚖️ A seesaw balances. Meena (110 N) sits ? m from the pivot on one side; Arjun (110 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
39. 39.⚖️ A lever bar balances. The load is 360 N at 50 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.⚙️ Which simple machine is a crane hook block? (a) wedge (b) screw (c) lever (d) pulley

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