Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 773 · 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.True or false: a well winch handle is a pulley. (a) True (b) False
2. 2.Which of these is a wedge? (a) a jar lid (b) a chisel (c) a truck loading ramp (d) a well winch handle
3. 3.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 60 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
4. 4.True or false: a claw hammer on a nail is a lever. (a) False (b) True
5. 5.🪝 More rope sections holding a load means … (a) the load floats (b) no change (c) less effort needed (d) more effort needed
6. 6.💪 In which unit do we measure force? (a) litre (L) (b) metre (m) (c) second (s) (d) newton (N)
7. 7.Which of these is caused by muscular force? (a) a fridge magnet sticks (b) pedalling a cycle (c) a compass needle turns (d) a thrown ball comes down
8. 8.True or false: pulling up your socks is a push. (a) True (b) False
9. 9.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
10. 10.💪 In a tug of war, one team pulls left with 100 N and the other pulls right with 80 N. What is the size of the net force, in newtons?
11. 11.True or false: a pair of scissors is a class 1 lever (fulcrum in the middle). (a) False (b) True
12. 12.💪 Two children push a box to the right, one with 95 N and the other with 95 N. What is the net (total) force on the box, in newtons?
13. 13.⚖️ In a class 3 lever, what is in the middle? (a) the load (b) the fulcrum (c) the effort (d) the pulley
14. 14.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
15. 15.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
16. 16.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
17. 17.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
18. 18.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.⚙️ Most simple machines make work easier by letting us … (a) use a smaller force (b) switch off gravity (c) stop all friction (d) make new energy
20. 20.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
21. 21.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
22. 22.⚖️ A seesaw balances. Kabir (200 N) sits ? m from the pivot on one side; Zoya (100 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
23. 23.Which of these is a lever? (a) the tip of a nail (b) a claw hammer on a nail (c) a crane hook block (d) a round doorknob
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, a glass sheet 2 N, a wooden plank 4 N, a carpet 6 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
25. 25.⚖️ 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
26. 26.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
27. 27.🏋️ Pushing a crate 7 m took 1470 J of work. What force was used, in newtons?
28. 28.⚖️ A lever bar balances. The load is 800 N at 40 cm from the fulcrum. The effort is ? N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
29. 29.⚖️ A lever bar balances. The load is 210 N at 50 cm from the fulcrum. The effort is 150 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
30. 30.True or false: a well winch handle is a wedge. (a) False (b) True
31. 31.⚙️ Which simple machine is a knife edge? (a) pulley (b) screw (c) wedge (d) lever
32. 32.🪝 A pulley system lifts a 220 N load with an effort of 110 N. What is its mechanical advantage (MA)?
33. 33.🛞 Why are tyres made with deep treads? (a) to look nice (b) to grip the road (c) to go slower (d) to save rubber
34. 34.True or false: closing a drawer is a push. (a) False (b) True
35. 35.⚙️ Which simple machine is a flagpole rope wheel? (a) screw (b) inclined plane (c) pulley (d) lever
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 2 N, a wooden plank 4 N, a carpet 7 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) a glass sheet
37. 37.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 20 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
38. 38.💪 A bag has a mass of 56 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
39. 39.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a loose rope (c) a flat ramp (d) a sharp wedge
40. 40.🏋️ Pushing a crate 9 m took 3240 J of work. What force was used, in newtons?

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