Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 957 · 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 bottle opener is a class 2 lever (load in the middle). (a) True (b) False
2. 2.True or false: a fixed pulley is on a flagpole top. (a) True (b) False
3. 3.True or false: a door stopper is an inclined plane. (a) False (b) True
4. 4.💪 A cart is pulled to the right with 85 N and to the left with 95 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
5. 5.⚖️ A seesaw balances. Zoya (760 N) sits 1 m from the pivot on one side; Asha (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.🛞 Rubbing your hands fast makes them … (a) cold (b) warm (c) magnetic (d) wet
7. 7.💪 A cart is pulled to the right with 30 N and to the left with 15 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
8. 8.True or false: a bottle opener is a lever. (a) False (b) True
9. 9.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) time taken (d) distance from fulcrum
10. 10.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 12 (c) 10 (d) 3
11. 11.True or false: pressing a doorbell is a pull. (a) True (b) False
12. 12.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) ice (c) glass (d) sandpaper
13. 13.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 10 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
14. 14.Which of these is a screw? (a) a round doorknob (b) a bottle cap (c) a door stopper (d) a seesaw
15. 15.True or false: a grippy rubber sole gives less friction. (a) True (b) False
16. 16.⚖️ A seesaw balances. Meena (? N) sits 2 m from the pivot on one side; Arjun (240 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
17. 17.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
18. 18.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 160 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
19. 19.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
20. 20.⚖️ A lever bar balances. The load is 800 N at 50 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?
21. 21.Which of these is a lever? (a) a truck loading ramp (b) an axe blade (c) a claw hammer on a nail (d) a wheelchair ramp
22. 22.⚖️ A seesaw balances. Kabir (160 N) sits ? m from the pivot on one side; Zoya (160 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
23. 23.💪 In which unit do we measure force? (a) litre (L) (b) second (s) (c) metre (m) (d) newton (N)
24. 24.⚖️ A seesaw balances. Arjun (540 N) sits 1 m from the pivot on one side; Kabir (180 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
25. 25.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
26. 26.🏋️ A force of 160 N pushes a cart 1 m along the floor. How much work is done, in joules?
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a carpet 5 N, sandpaper 7 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
28. 28.🔍 Which is the odd one out? (a) a window blind cord (b) a nutcracker (c) a claw hammer on a nail (d) a crowbar
29. 29.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
30. 30.True or false: sand on a slippery path gives less friction. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) an axe blade (b) the tip of a nail (c) a door stopper (d) a wheelchair ramp
32. 32.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
33. 33.🛞 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, ice 1 N. How many newtons more were needed on sandpaper than on ice?
34. 34.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
35. 35.Which of these is caused by gravity? (a) a magnet picks up pins (b) pedalling a cycle (c) rain falls to the ground (d) brakes stop a bicycle
36. 36.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 100 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
37. 37.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
38. 38.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 2 (c) class 1
39. 39.⚖️ A lever balances when … (a) the bar is short (b) turning effects match (c) the fulcrum moves (d) both weights are equal
40. 40.🔍 Which is the odd one out? (a) a knife edge (b) an axe blade (c) a chisel (d) a nut and bolt

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