Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 169 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, a glass sheet 4 N, a wooden plank 6 N, a carpet 10 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
2. 2.⚙️ Which simple machine is a bottle cap? (a) inclined plane (b) pulley (c) screw (d) wedge
3. 3.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
4. 4.🛞 Rubbing your hands fast makes them … (a) cold (b) wet (c) magnetic (d) warm
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 30 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
6. 6.💪 A cart is pulled to the right with 55 N and to the left with 50 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
7. 7.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
8. 8.💪 A box weighs 510 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
9. 9.⚙️ A screw is really … (a) a bent lever (b) a kind of wheel (c) a tiny pulley (d) a ramp wrapped round
10. 10.True or false: a crowbar is a lever. (a) False (b) True
11. 11.True or false: a movable pulley is on a flagpole top. (a) True (b) False
12. 12.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 160 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
13. 13.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 8 N, ice 1 N, a glass sheet 5 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) a carpet
15. 15.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Kabir (170 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
16. 16.⚖️ A seesaw balances. Kabir (480 N) sits 2 m from the pivot on one side; Ravi (320 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
17. 17.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
18. 18.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) closer to the pivot (c) farther from the pivot (d) on the pivot
19. 19.🛞 Friction acts … (a) with the motion (b) only on ice (c) only upwards (d) against the motion
20. 20.True or false: a fixed pulley needs effort = load. (a) True (b) False
21. 21.⚖️ Which class of lever is a bottle opener? (a) class 3 (b) class 1 (c) class 2
22. 22.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
23. 23.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) distance from fulcrum (d) time taken
24. 24.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
25. 25.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
26. 26.💪 In a tug of war, one team pulls right with 15 N and the other pulls left with 5 N. What is the size of the net force, in newtons?
27. 27.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
28. 28.⚙️ Which simple machine is a window blind cord? (a) wheel and axle (b) screw (c) pulley (d) lever
29. 29.💪 A cart is pulled to the right with 55 N and to the left with 40 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
30. 30.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
31. 31.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
32. 32.🔍 Which is the odd one out? (a) a window blind cord (b) a flagpole rope wheel (c) a well-bucket rope wheel (d) an axe blade
33. 33.⚖️ In a class 2 lever, what is in the middle? (a) the fulcrum (b) the load (c) the effort (d) the axle
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, a glass sheet 3 N, a wooden plank 6 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) a carpet
35. 35.💪 Which can a force NOT do? (a) start it moving (b) stop it moving (c) change its colour (d) change its shape
36. 36.🔍 Which is the odd one out? (a) a steering wheel (b) a jar lid (c) a bottle cap (d) a wood screw
37. 37.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
38. 38.💪 Which force is at work: rubbing hands warms them? (a) gravity (b) friction (c) muscular force (d) magnetic force
39. 39.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
40. 40.⚖️ What is the pivot point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum

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