Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 869 · 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 screw jack (b) a wood screw (c) a nut and bolt (d) a knife edge
2. 2.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
3. 3.True or false: powder on a carrom board gives less friction. (a) True (b) False
4. 4.Which of these is a screw? (a) a door stopper (b) a nutcracker (c) a wood screw (d) a seesaw
5. 5.⚙️ Which simple machine is a window blind cord? (a) screw (b) wheel and axle (c) pulley (d) wedge
6. 6.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
7. 7.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
8. 8.💪 A cart is pulled to the right with 75 N and to the left with 85 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
9. 9.🪝 A well winch has a handle (wheel) of radius 2 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 9 N, sandpaper 13 N, ice 4 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
11. 11.True or false: a playground slide is a wedge. (a) True (b) False
12. 12.True or false: a nut and bolt is a pulley. (a) True (b) False
13. 13.⚖️ A seesaw balances. Ravi (570 N) sits 2 m from the pivot on one side; Kabir (380 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
14. 14.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
15. 15.⚖️ Which class of lever is your forearm? (a) class 1 (b) class 3 (c) class 2
16. 16.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a smaller rod (axle) (c) a flat ramp (d) a loose rope
17. 17.⚖️ 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 2 (c) class 1
18. 18.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
19. 19.⚖️ A seesaw balances. Ravi (? N) sits 1 m from the pivot on one side; Zoya (170 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
20. 20.⚙️ A screw is really … (a) a bent lever (b) a tiny pulley (c) a ramp wrapped round (d) a kind of wheel
21. 21.⚖️ A seesaw balances. Arjun (520 N) sits 2 m from the pivot on one side; Meena (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
23. 23.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
24. 24.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 10 (c) 12 (d) 3
25. 25.⚖️ A lever bar balances. The load is 320 N at 20 cm from the fulcrum. The effort is ? N at 40 cm from the fulcrum on the other side. What is the missing force 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.True or false: a flagpole rope wheel is an inclined plane. (a) False (b) True
28. 28.Which of these is caused by magnetic force? (a) lifting a school bag (b) rain falls to the ground (c) a magnet picks up pins (d) an apple falls down
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 6 N, a carpet 8 N, ice 1 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) ice
30. 30.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 6 N, a carpet 8 N, sandpaper 12 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) a glass sheet
32. 32.🪝 A pulley system lifts a 320 N load with an effort of 160 N. What is its mechanical advantage (MA)?
33. 33.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
34. 34.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
35. 35.⚖️ In a class 1 lever, what is in the middle? (a) the load (b) the effort (c) the fulcrum (d) nothing
36. 36.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 20 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
37. 37.💪 Two children push a box to the right, one with 85 N and the other with 90 N. What is the net (total) force on the box, in newtons?
38. 38.💪 A box weighs 40 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
39. 39.💪 Two children push a box to the right, one with 70 N and the other with 50 N. What is the net (total) force on the box, in newtons?
40. 40.⚖️ A seesaw balances. Ravi (340 N) sits ? m from the pivot on one side; Asha (170 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?

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