Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 341 · 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 smooth steel slide gives more friction. (a) True (b) False
2. 2.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
3. 3.🔍 Which is the odd one out? (a) a jar lid (b) a nut and bolt (c) a screw jack (d) a well-bucket rope wheel
4. 4.💪 Which force is at work: brakes stop a bicycle? (a) gravity (b) friction (c) muscular force (d) magnetic force
5. 5.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
6. 6.🏋️ A force of 500 N did 500 J of work. How many metres did the object move?
7. 7.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
8. 8.⚖️ A lever balances when … (a) both weights are equal (b) the fulcrum moves (c) the bar is short (d) turning effects match
9. 9.🏋️ A 4 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.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 0 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
11. 11.⚖️ A seesaw balances. Ravi (800 N) sits 4 m from the pivot on one side; Arjun (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
12. 12.⚖️ Turning effect = force × … (a) colour of bar (b) time taken (c) distance from fulcrum (d) mass of fulcrum
13. 13.🛞 Friction acts … (a) with the motion (b) only on ice (c) only upwards (d) against the motion
14. 14.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
15. 15.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 3 N, a carpet 7 N, sandpaper 8 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) a wooden plank
17. 17.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 10 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
18. 18.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 12 (c) 6 (d) 10
19. 19.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
20. 20.🪝 A load of 780 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
21. 21.💪 Which force is at work: shoes grip the floor? (a) friction (b) muscular force (c) magnetic force (d) gravity
22. 22.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
23. 23.Which of these is a wedge? (a) a crowbar (b) the tip of a nail (c) a round doorknob (d) a flagpole rope wheel
24. 24.⚖️ What is the pivot point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
25. 25.🔍 Which is the odd one out? (a) a water tap handle (b) a steering wheel (c) a crane hook block (d) a round doorknob
26. 26.Which of these is a pulley? (a) a claw hammer on a nail (b) a crowbar (c) a crane hook block (d) a truck loading ramp
27. 27.⚖️ A seesaw balances. Kabir (560 N) sits 1 m from the pivot on one side; Ravi (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, ice 2 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on ice?
29. 29.🏋️ Pushing a crate 4 m took 1600 J of work. What force was used, in newtons?
30. 30.💪 Which force is at work: pedalling a cycle? (a) friction (b) muscular force (c) gravity (d) magnetic force
31. 31.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
32. 32.⚙️ Which simple machine is a screw jack? (a) screw (b) wheel and axle (c) inclined plane (d) pulley
33. 33.True or false: a nut and bolt is an inclined plane. (a) True (b) False
34. 34.True or false: a box pushed on carpet gives more friction. (a) False (b) True
35. 35.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 3 (b) class 1 (c) class 2
36. 36.⚖️ 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
37. 37.🪝 A load of 600 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
38. 38.💪 Which force is at work: lifting a school bag? (a) magnetic force (b) gravity (c) muscular force (d) friction
39. 39.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
40. 40.🛞 Rubbing your hands fast makes them … (a) warm (b) cold (c) wet (d) magnetic

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