Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 339 · 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 force is at work: a river flows downhill? (a) gravity (b) muscular force (c) friction (d) magnetic force
2. 2.⚙️ Most simple machines make work easier by letting us … (a) use a smaller force (b) make new energy (c) switch off gravity (d) stop all friction
3. 3.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
4. 4.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 12 (c) 3 (d) 6
5. 5.🪝 A load of 180 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
6. 6.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 2 (c) class 1
7. 7.⚖️ Turning effect = force × … (a) mass of fulcrum (b) distance from fulcrum (c) time taken (d) colour of bar
8. 8.🏋️ Pushing a crate 2 m took 660 J of work. What force was used, in newtons?
9. 9.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a grippy rubber sole (c) skating on ice (d) chalk on a gym bar
10. 10.True or false: pushing a trolley is a push. (a) False (b) True
11. 11.True or false: a pair of scissors is a class 2 lever (load in the middle). (a) False (b) True
12. 12.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
13. 13.🏋️ A force of 420 N did 1680 J of work. How many metres did the object move?
14. 14.⚖️ A seesaw balances. Kabir (640 N) sits ? m from the pivot on one side; Ravi (480 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
15. 15.💪 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) to the right (b) no net force (c) to the left
16. 16.⚙️ A screw is really … (a) a ramp wrapped round (b) a bent lever (c) a kind of wheel (d) a tiny pulley
17. 17.🏋️ Pushing a crate 5 m took 1450 J of work. What force was used, in newtons?
18. 18.⚙️ Which simple machine is a door stopper? (a) wedge (b) lever (c) wheel and axle (d) pulley
19. 19.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
20. 20.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
21. 21.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
22. 22.⚖️ A seesaw balances. Zoya (130 N) sits 2 m from the pivot on one side; Ravi (260 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
23. 23.True or false: hitting a cricket ball is a pull. (a) False (b) True
24. 24.🪝 What does a single fixed pulley change? (a) the size of the load (b) the colour of rope (c) the direction of pull (d) gravity
25. 25.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to look nice (c) to grip the road (d) to go slower
26. 26.True or false: a fixed pulley needs effort = load. (a) False (b) True
27. 27.⚙️ Which simple machine is a road up a hill? (a) inclined plane (b) pulley (c) wedge (d) lever
28. 28.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
29. 29.True or false: hitting a cricket ball is a push. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wheel on ball bearings (c) skating on ice (d) a wet tiled floor
31. 31.True or false: a movable pulley stays in one place. (a) False (b) True
32. 32.⚙️ Which simple machine is a crowbar? (a) pulley (b) inclined plane (c) wheel and axle (d) lever
33. 33.Which of these is caused by friction? (a) a thrown ball comes down (b) a river flows downhill (c) squeezing a lemon (d) brakes stop a bicycle
34. 34.⚖️ A lever balances when … (a) the bar is short (b) turning effects match (c) both weights are equal (d) the fulcrum moves
35. 35.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
36. 36.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) closer to the pivot (c) on the pivot (d) anywhere
37. 37.💪 Which force is at work: an apple falls down? (a) muscular force (b) gravity (c) magnetic force (d) friction
38. 38.💪 Which force is at work: pedalling a cycle? (a) gravity (b) magnetic force (c) friction (d) muscular force
39. 39.💪 Is plucking a mango 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: ice 4 N, a glass sheet 6 N, a wooden plank 9 N, a carpet 13 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet

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