Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 562 · 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) skating on ice (b) a rough doormat (c) a tyre with deep treads (d) sand on a slippery path
2. 2.True or false: a seesaw is a class 2 lever (load in the middle). (a) False (b) True
3. 3.⚙️ Which simple machine is a wood screw? (a) inclined plane (b) pulley (c) lever (d) screw
4. 4.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) switch off gravity (c) stop all friction (d) use a smaller force
5. 5.⚖️ A lever balances when … (a) both weights are equal (b) the bar is short (c) the fulcrum moves (d) turning effects match
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 11 N, ice 2 N, a glass sheet 6 N. How many newtons more were needed on sandpaper than on ice?
7. 7.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 90 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
8. 8.🪝 A bucket weighing 440 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
9. 9.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
10. 10.🪝 A winch has a wheel of radius 6 cm and an axle of radius 2 cm. What effort on the wheel lifts a 90 N bucket on the axle, in newtons? (ideal)
11. 11.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
12. 12.⚖️ Which class of lever is a wheelbarrow? (a) class 2 (b) class 1 (c) class 3
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 3 N, a wooden plank 4 N, a carpet 7 N. How many newtons more were needed on sandpaper than on ice?
14. 14.🛞 Friction acts … (a) against the motion (b) only on ice (c) only upwards (d) with the motion
15. 15.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
16. 16.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
17. 17.True or false: a wheelbarrow is a class 2 lever (load in the middle). (a) True (b) False
18. 18.⚖️ A seesaw balances. Kabir (300 N) sits ? m from the pivot on one side; Zoya (600 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
19. 19.True or false: a movable pulley rises with the load. (a) True (b) False
20. 20.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
21. 21.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
22. 22.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a wet tiled floor (c) a grippy rubber sole (d) powder on a carrom board
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, ice 3 N, a wooden plank 4 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) ice (d) a carpet
24. 24.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
25. 25.💪 A box weighs 40 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
26. 26.⚙️ Which simple machine is a bottle cap? (a) screw (b) inclined plane (c) pulley (d) wedge
27. 27.🪝 A pulley system lifts a 580 N load with an effort of 290 N. What is its mechanical advantage (MA)?
28. 28.💪 A cart is pulled to the right with 90 N and to the left with 105 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
29. 29.🛞 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 12 N, ice 3 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) sandpaper (d) a carpet
30. 30.🔍 Which is the odd one out? (a) a wood screw (b) the tip of a nail (c) a knife edge (d) an axe blade
31. 31.💪 In which unit do we measure force? (a) metre (m) (b) litre (L) (c) second (s) (d) newton (N)
32. 32.⚖️ A seesaw balances. Kabir (570 N) sits 1 m from the pivot on one side; Ravi (190 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
33. 33.🏋️ A 12 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.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
35. 35.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
36. 36.⚖️ A lever bar balances. The load is 240 N at 50 cm from the fulcrum. The effort is 400 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
37. 37.⚖️ A seesaw balances. Ravi (600 N) sits 2 m from the pivot on one side; Asha (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
38. 38.Which of these is caused by gravity? (a) a rolling ball slows (b) a fridge magnet sticks (c) a thrown ball comes down (d) lifting a school bag
39. 39.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 3 (b) class 1 (c) class 2
40. 40.True or false: closing a drawer is a push. (a) False (b) True

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