Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 96 · 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 simple machine is a crowbar? (a) screw (b) lever (c) inclined plane (d) wedge
2. 2.⚖️ In a class 2 lever, what is in the middle? (a) the fulcrum (b) the load (c) the effort (d) the axle
3. 3.True or false: pressing a doorbell is a push. (a) False (b) True
4. 4.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
5. 5.🔍 Which is the odd one out? (a) a grippy rubber sole (b) chalk on a gym bar (c) a wheel on ball bearings (d) a rough doormat
6. 6.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
7. 7.⚖️ A lever bar balances. The load is 60 N at ? cm from the fulcrum. The effort is 20 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
8. 8.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the pulley (c) the load (d) the effort
9. 9.🪝 A bucket weighing 320 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
10. 10.⚖️ Which class of lever is a crowbar? (a) class 3 (b) class 1 (c) class 2
11. 11.True or false: powder on a carrom board gives less friction. (a) False (b) True
12. 12.True or false: a tyre with deep treads gives more friction. (a) True (b) False
13. 13.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) time taken (d) distance from fulcrum
14. 14.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
15. 15.🔍 Which is the odd one out? (a) a round doorknob (b) a well winch handle (c) a door stopper (d) a steering wheel
16. 16.⚖️ A seesaw balances. Zoya (? N) sits 3 m from the pivot on one side; Meena (390 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
17. 17.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 20 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
18. 18.🔍 Which is the odd one out? (a) skating on ice (b) oil on a squeaky hinge (c) chalk on a gym bar (d) a smooth steel slide
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 9 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) a glass sheet
20. 20.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
21. 21.💪 Which force is at work: rubbing hands warms them? (a) friction (b) gravity (c) magnetic force (d) muscular force
22. 22.⚖️ In a class 1 lever, what is in the middle? (a) the load (b) the fulcrum (c) nothing (d) the effort
23. 23.True or false: a movable pulley makes you pull 2× rope. (a) True (b) False
24. 24.Which of these is an inclined plane? (a) a seesaw (b) a bottle cap (c) a wheelchair ramp (d) a screw jack
25. 25.⚖️ A lever bar balances. The load is 270 N at 10 cm from the fulcrum. The effort is 30 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
26. 26.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
27. 27.True or false: a pair of pliers is a class 2 lever (load in the middle). (a) False (b) True
28. 28.🏋️ A force of 360 N pushes a cart 9 m along the floor. How much work is done, in joules?
29. 29.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
30. 30.⚖️ Along a straight bar, measured from the left end, the effort is at 110 cm, the fulcrum at 30 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
31. 31.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
32. 32.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
33. 33.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
34. 34.⚙️ Which simple machine is a truck loading ramp? (a) wheel and axle (b) wedge (c) inclined plane (d) pulley
35. 35.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
36. 36.⚖️ A seesaw balances. Kabir (440 N) sits 2 m from the pivot on one side; Zoya (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
37. 37.Which of these is caused by friction? (a) lifting a school bag (b) a rolling ball slows (c) an apple falls down (d) pedalling a cycle
38. 38.💪 A cart is pulled to the right with 100 N and to the left with 115 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
39. 39.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
40. 40.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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