Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 422 · 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 class of lever is a wheelbarrow? (a) class 3 (b) class 1 (c) class 2
2. 2.🏋️ Pushing a crate 3 m took 870 J of work. What force was used, in newtons?
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 4 N, sandpaper 6 N, ice 1 N, a wooden plank 2 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
4. 4.True or false: a wet tiled floor gives less friction. (a) False (b) True
5. 5.⚙️ A screw is really … (a) a ramp wrapped round (b) a kind of wheel (c) a bent lever (d) a tiny pulley
6. 6.True or false: a wet tiled floor gives more friction. (a) False (b) True
7. 7.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
8. 8.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) anywhere (c) closer to the pivot (d) farther from the pivot
9. 9.Which of these is caused by muscular force? (a) lifting a school bag (b) rubbing hands warms them (c) a thrown ball comes down (d) a compass needle turns
10. 10.🏋️ Pushing a crate 5 m took 350 J of work. What force was used, in newtons?
11. 11.⚖️ A lever bar balances. The load is 160 N at 30 cm from the fulcrum. The effort is 240 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
12. 12.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
13. 13.🛞 Friction acts … (a) against the motion (b) only on ice (c) only upwards (d) with the motion
14. 14.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) no change (d) less effort needed
15. 15.⚙️ Which simple machine is a seesaw? (a) wheel and axle (b) lever (c) pulley (d) inclined plane
16. 16.⚖️ A lever bar balances. The load is 500 N at ? cm from the fulcrum. The effort is 100 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
17. 17.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) distance from fulcrum (d) time taken
18. 18.🏋️ A force of 130 N did 260 J of work. How many metres did the object move?
19. 19.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
20. 20.💪 A box weighs 100 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
21. 21.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
22. 22.⚙️ Which simple machine is a window blind cord? (a) lever (b) inclined plane (c) pulley (d) wheel and axle
23. 23.🪝 A load of 1160 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
24. 24.💪 A box weighs 260 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
25. 25.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Zoya (540 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
26. 26.True or false: a pair of scissors is a class 2 lever (load in the middle). (a) True (b) False
27. 27.🏋️ A force of 490 N did 1960 J of work. How many metres did the object move?
28. 28.True or false: a pair of scissors is a class 1 lever (fulcrum in the middle). (a) False (b) True
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 15 N, ice 4 N, a glass sheet 8 N, a carpet 11 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) sandpaper (d) a carpet
30. 30.🪝 What does a single fixed pulley change? (a) the direction of pull (b) gravity (c) the colour of rope (d) the size of the load
31. 31.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
32. 32.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
33. 33.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
34. 34.True or false: a rough doormat gives more friction. (a) False (b) True
35. 35.⚙️ Which simple machine is a road up a hill? (a) lever (b) pulley (c) screw (d) inclined plane
36. 36.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
37. 37.🏋️ Pushing a crate 1 m took 410 J of work. What force was used, in newtons?
38. 38.⚖️ In a class 3 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the pulley (d) the load
39. 39.True or false: a movable pulley needs effort = load. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) a jar lid (b) a wood screw (c) a knife edge (d) a screw jack

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