Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 89 · 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 of these is a wheel and axle? (a) a water tap handle (b) a claw hammer on a nail (c) a road up a hill (d) a chisel
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a glass sheet 3 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on ice?
3. 3.True or false: a pair of scissors is a class 2 lever (load in the middle). (a) True (b) False
4. 4.True or false: a movable pulley halves the effort. (a) False (b) True
5. 5.⚖️ Turning effect = force × … (a) mass of fulcrum (b) distance from fulcrum (c) colour of bar (d) time taken
6. 6.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 30 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
7. 7.🏋️ A force of 330 N did 990 J of work. How many metres did the object move?
8. 8.🏋️ A force of 70 N did 350 J of work. How many metres did the object move?
9. 9.True or false: a fixed pulley is on a flagpole top. (a) False (b) True
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 7 N, sandpaper 11 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) sandpaper
11. 11.True or false: a box pushed on carpet gives more friction. (a) False (b) True
12. 12.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
13. 13.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?
14. 14.🪝 A winch has a wheel of radius 40 cm and an axle of radius 5 cm. What effort on the wheel lifts a 320 N bucket on the axle, in newtons? (ideal)
15. 15.🪝 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?
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 60 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
17. 17.🪝 More rope sections holding a load means … (a) no change (b) more effort needed (c) the load floats (d) less effort needed
18. 18.⚙️ Which simple machine is a well-bucket rope wheel? (a) wheel and axle (b) wedge (c) inclined plane (d) pulley
19. 19.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
20. 20.💪 A force is a … (a) kind of colour (b) type of sound (c) push or a pull (d) unit of time
21. 21.⚖️ A lever bar balances. The load is 30 N at ? cm from the fulcrum. The effort is 10 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
22. 22.🪝 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
23. 23.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
24. 24.🏋️ A force of 410 N pushes a cart 4 m along the floor. How much work is done, in joules?
25. 25.⚖️ A seesaw balances. Arjun (520 N) sits 1 m from the pivot on one side; Asha (130 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
26. 26.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a grippy rubber sole (c) sand on a slippery path (d) a box pushed on carpet
27. 27.True or false: pulling up your socks is a pull. (a) False (b) True
28. 28.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 70 cm and the load at 110 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
29. 29.Which of these is caused by magnetic force? (a) a magnet picks up pins (b) squeezing a lemon (c) brakes stop a bicycle (d) pedalling a cycle
30. 30.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
31. 31.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Arjun (320 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
32. 32.🏋️ A force of 470 N pushes a cart 9 m along the floor. How much work is done, in joules?
33. 33.Which of these is an inclined plane? (a) a crowbar (b) a steering wheel (c) a bottle opener (d) a wheelchair ramp
34. 34.⚙️ A wedge is … (a) a bar on a pivot (b) a rope on a wheel (c) two ramps back to back (d) a wheel on a rod
35. 35.Which of these is a wedge? (a) a steering wheel (b) a bottle opener (c) an axe blade (d) a seesaw
36. 36.⚖️ Which class of lever is a seesaw? (a) class 3 (b) class 1 (c) class 2
37. 37.🔍 Which is the odd one out? (a) a rough doormat (b) a wheel on ball bearings (c) skating on ice (d) a wet tiled floor
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 8 N, sandpaper 10 N, a glass sheet 4 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) a glass sheet
39. 39.🔍 Which is the odd one out? (a) a nut and bolt (b) a seesaw (c) a nutcracker (d) a claw hammer on a nail
40. 40.⚖️ A seesaw balances. Asha (100 N) sits 2 m from the pivot on one side; Zoya (200 N) sits ? m from the pivot on the other side. What is the missing distance in metres?

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