Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 202 · 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 tug of war is a pull. (a) False (b) True
2. 2.🏋️ A force of 260 N did 1300 J of work. How many metres did the object move?
3. 3.⚖️ A seesaw balances. Ravi (240 N) sits ? m from the pivot on one side; Meena (480 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
4. 4.True or false: a pair of kitchen tongs is a class 1 lever (fulcrum in the middle). (a) False (b) True
5. 5.True or false: a tyre with deep treads gives more friction. (a) True (b) False
6. 6.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 400 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
7. 7.⚙️ Which simple machine is a crane hook block? (a) wheel and axle (b) pulley (c) screw (d) wedge
8. 8.⚙️ Which simple machine is a bottle cap? (a) wheel and axle (b) inclined plane (c) lever (d) screw
9. 9.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
10. 10.⚖️ A lever bar balances. The load is 810 N at 50 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
11. 11.🔍 Which is the odd one out? (a) a crowbar (b) a truck loading ramp (c) a seesaw (d) a nutcracker
12. 12.Which of these is caused by muscular force? (a) shoes grip the floor (b) rain falls to the ground (c) an apple falls down (d) pedalling a cycle
13. 13.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
14. 14.⚙️ Which simple machine is a door stopper? (a) wedge (b) pulley (c) wheel and axle (d) inclined plane
15. 15.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
16. 16.True or false: a nutcracker is an inclined plane. (a) True (b) False
17. 17.⚖️ Along a straight bar, measured from the left end, the effort is at 80 cm, the fulcrum at 40 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
18. 18.⚖️ A lever bar balances. The load is 210 N at ? cm from the fulcrum. The effort is 60 N at 70 cm from the fulcrum on the other side. What is the missing distance in centimetres?
19. 19.🏋️ A force of 130 N pushes a cart 2 m along the floor. How much work is done, in joules?
20. 20.⚙️ Which simple machine is a bottle opener? (a) lever (b) pulley (c) wheel and axle (d) screw
21. 21.💪 Which force is at work: squeezing a lemon? (a) magnetic force (b) muscular force (c) gravity (d) friction
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, a glass sheet 3 N, a wooden plank 5 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
23. 23.🔍 Which is the odd one out? (a) a bottle cap (b) a well-bucket rope wheel (c) a nut and bolt (d) a wood screw
24. 24.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
25. 25.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 4 N, a wooden plank 5 N, sandpaper 6 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a glass sheet (d) a wooden plank
27. 27.⚖️ A seesaw balances. Asha (140 N) sits 1 m from the pivot on one side; Ravi (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
28. 28.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, ice 1 N, a glass sheet 3 N, a wooden plank 7 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
30. 30.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
31. 31.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
32. 32.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
33. 33.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
34. 34.🛞 Rubbing your hands fast makes them … (a) warm (b) wet (c) cold (d) magnetic
35. 35.⚖️ Which class of lever is a crowbar? (a) class 3 (b) class 1 (c) class 2
36. 36.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
37. 37.Which of these is a wheel and axle? (a) a jar lid (b) a wood screw (c) a well-bucket rope wheel (d) a round doorknob
38. 38.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
39. 39.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 11 N, ice 3 N, a glass sheet 4 N. How many newtons more were needed on a carpet than on ice?

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