Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 442 · 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 is the odd one out? (a) a wood screw (b) a nut and bolt (c) a wheelchair ramp (d) a bottle cap
2. 2.🪝 A bucket weighing 130 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
3. 3.🏋️ Pushing a crate 1 m took 140 J of work. What force was used, in newtons?
4. 4.⚙️ Which simple machine is a well-bucket rope wheel? (a) wheel and axle (b) inclined plane (c) pulley (d) lever
5. 5.True or false: pulling a cart is a push. (a) False (b) True
6. 6.💪 A force is a … (a) type of sound (b) push or a pull (c) unit of time (d) kind of colour
7. 7.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 10 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
8. 8.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
9. 9.🪝 A winch has a wheel of radius 21 cm and an axle of radius 3 cm. What effort on the wheel lifts a 700 N bucket on the axle, in newtons? (ideal)
10. 10.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) ice (c) polished marble (d) glass
11. 11.⚖️ A seesaw balances. Ravi (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?
12. 12.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 70 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
13. 13.True or false: kicking a football is a push. (a) False (b) True
14. 14.⚖️ A seesaw balances. Asha (340 N) sits 2 m from the pivot on one side; Meena (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
15. 15.⚖️ Turning effect = force × … (a) mass of fulcrum (b) distance from fulcrum (c) colour of bar (d) time taken
16. 16.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
17. 17.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 6 (c) 3 (d) 12
18. 18.⚙️ A screw is really … (a) a bent lever (b) a kind of wheel (c) a tiny pulley (d) a ramp wrapped round
19. 19.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 10 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
20. 20.Which of these is a pulley? (a) a wood screw (b) an axe blade (c) a bottle cap (d) a window blind cord
21. 21.⚖️ A seesaw balances. Meena (800 N) sits ? m from the pivot on one side; Arjun (200 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
22. 22.⚖️ A lever balances when … (a) turning effects match (b) the fulcrum moves (c) the bar is short (d) both weights are equal
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 20 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
24. 24.💪 A cart is pulled to the right with 60 N and to the left with 60 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
25. 25.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 70 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
26. 26.⚖️ Which class of lever is a lemon squeezer? (a) class 3 (b) class 2 (c) class 1
27. 27.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
28. 28.⚖️ In a class 3 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the load (d) the pulley
29. 29.💪 In which unit do we measure force? (a) metre (m) (b) litre (L) (c) newton (N) (d) second (s)
30. 30.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 3 (c) class 1
31. 31.⚖️ What is the pivot point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
32. 32.💪 A box weighs 480 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
33. 33.🪝 A winch has a wheel of radius 30 cm and an axle of radius 5 cm. What effort on the wheel lifts a 180 N bucket on the axle, in newtons? (ideal)
34. 34.🪝 A winch has a wheel of radius 10 cm and an axle of radius 2 cm. What effort on the wheel lifts a 150 N bucket on the axle, in newtons? (ideal)
35. 35.Which of these is caused by friction? (a) squeezing a lemon (b) a river flows downhill (c) rubbing hands warms them (d) a magnet picks up pins
36. 36.Which of these is caused by friction? (a) a river flows downhill (b) a thrown ball comes down (c) a rolling ball slows (d) lifting a school bag
37. 37.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 5 N, a carpet 8 N, sandpaper 11 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) ice
39. 39.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
40. 40.⚙️ Which simple machine is a playground slide? (a) pulley (b) screw (c) lever (d) inclined plane

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