Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 20 · 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.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
2. 2.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) False (b) True
3. 3.💪 A bag has a mass of 2 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
4. 4.💪 A bag has a mass of 3 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
5. 5.Which of these is caused by gravity? (a) a river flows downhill (b) a magnet picks up pins (c) rubbing hands warms them (d) pedalling a cycle
6. 6.🏋️ A force of 430 N pushes a cart 2 m along the floor. How much work is done, in joules?
7. 7.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
8. 8.⚙️ Which simple machine is a wheelchair ramp? (a) inclined plane (b) lever (c) screw (d) pulley
9. 9.Which of these is caused by magnetic force? (a) a magnet picks up pins (b) shoes grip the floor (c) rubbing hands warms them (d) lifting a school bag
10. 10.⚖️ A seesaw balances. Ravi (340 N) sits ? m from the pivot on one side; Meena (510 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
11. 11.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 400 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
12. 12.⚖️ A lever bar balances. The load is 700 N at 40 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?
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 12 N, ice 4 N, a glass sheet 6 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
14. 14.💪 Which force is at work: a thrown ball comes down? (a) magnetic force (b) gravity (c) friction (d) muscular force
15. 15.Which of these is a pulley? (a) a bottle cap (b) a water tap handle (c) a wheelchair ramp (d) a window blind cord
16. 16.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 3 (c) 12 (d) 6
17. 17.⚖️ A seesaw balances. Arjun (570 N) sits ? m from the pivot on one side; Meena (760 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
18. 18.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
19. 19.🪝 A pulley system lifts a 480 N load with an effort of 240 N. What is its mechanical advantage (MA)?
20. 20.🏋️ Pushing a crate 2 m took 100 J of work. What force was used, in newtons?
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 5 N, sandpaper 6 N, a glass sheet 2 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) sandpaper
22. 22.🪝 A bucket weighing 20 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
23. 23.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
24. 24.⚖️ What is the pivot point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
25. 25.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a loose rope (c) a sharp wedge (d) a smaller rod (axle)
26. 26.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to grip the road (d) to save rubber
27. 27.True or false: a truck loading ramp is a wheel and axle. (a) True (b) False
28. 28.🏋️ A force of 160 N pushes a cart 2 m along the floor. How much work is done, in joules?
29. 29.True or false: a screw jack is a wedge. (a) False (b) True
30. 30.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 2 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a glass sheet (d) sandpaper
32. 32.⚖️ A seesaw balances. Arjun (100 N) sits 1 m from the pivot on one side; Meena (100 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
33. 33.🪝 A pulley system lifts a 440 N load with an effort of 110 N. What is its mechanical advantage (MA)?
34. 34.True or false: a beam balance is a class 3 lever (effort in the middle). (a) False (b) True
35. 35.⚖️ A seesaw balances. Zoya (330 N) sits 2 m from the pivot on one side; Arjun (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.True or false: a movable pulley halves the effort. (a) False (b) True
37. 37.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
38. 38.True or false: a lemon squeezer is a class 1 lever (fulcrum in the middle). (a) False (b) True
39. 39.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
40. 40.True or false: a door stopper is a wedge. (a) True (b) False

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