Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 56 · 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 grippy rubber sole (b) a wheel on ball bearings (c) a rough doormat (d) sand on a slippery path
2. 2.True or false: skating on ice gives more friction. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) a nut and bolt (b) a wheelchair ramp (c) a wood screw (d) a bottle cap
4. 4.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
5. 5.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) balanced (c) unbalanced (d) gravity
6. 6.True or false: plucking a mango is a push. (a) False (b) True
7. 7.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 2 (c) class 3
8. 8.Which of these is an inclined plane? (a) a round doorknob (b) a well winch handle (c) a wheelchair ramp (d) a seesaw
9. 9.⚖️ A seesaw balances. Ravi (570 N) sits ? m from the pivot on one side; Asha (380 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
10. 10.Which of these is a pulley? (a) a flagpole rope wheel (b) a bottle opener (c) a nut and bolt (d) a claw hammer on a nail
11. 11.True or false: a tug of war is a pull. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) a bottle opener (b) a crowbar (c) a claw hammer on a nail (d) a road up a hill
13. 13.💪 A bag has a mass of 30 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
14. 14.🔍 Which is the odd one out? (a) a well winch handle (b) a round doorknob (c) a steering wheel (d) a truck loading ramp
15. 15.🪝 A load of 360 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
16. 16.True or false: pressing a doorbell is a pull. (a) True (b) False
17. 17.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
18. 18.💪 Two children push a box to the right, one with 5 N and the other with 90 N. What is the net (total) force on the box, in newtons?
19. 19.💪 Which force is at work: an apple falls down? (a) gravity (b) magnetic force (c) friction (d) muscular force
20. 20.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 300 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.💪 Which force is at work: lifting a school bag? (a) gravity (b) muscular force (c) magnetic force (d) friction
22. 22.⚖️ What is the pivot point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
23. 23.True or false: pulling up your socks is a pull. (a) False (b) True
24. 24.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
25. 25.⚙️ Which simple machine is a truck loading ramp? (a) wheel and axle (b) inclined plane (c) screw (d) pulley
26. 26.🪝 A well winch has a handle (wheel) of radius 15 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, sandpaper 7 N, ice 1 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) sandpaper
28. 28.Which of these is a lever? (a) a wood screw (b) a nut and bolt (c) a nutcracker (d) a well winch handle
29. 29.💪 A bag has a mass of 12 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
30. 30.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
31. 31.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
32. 32.⚙️ Which simple machine is a water tap handle? (a) wheel and axle (b) lever (c) pulley (d) inclined plane
33. 33.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
34. 34.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
35. 35.True or false: a nut and bolt is a screw. (a) False (b) True
36. 36.🪝 More rope sections holding a load means … (a) the load floats (b) less effort needed (c) more effort needed (d) no change
37. 37.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a sharp wedge (c) a smaller rod (axle) (d) a loose rope
38. 38.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 12 N, ice 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) ice (d) a carpet
40. 40.💪 A box weighs 540 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?

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