Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 886 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, ice 3 N, a glass sheet 5 N, a wooden plank 6 N. How many newtons more were needed on a carpet than on ice?
2. 2.Which of these is a lever? (a) a well winch handle (b) a wheelchair ramp (c) a jar lid (d) a nutcracker
3. 3.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
4. 4.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 60 cm and the load at 100 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
6. 6.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
7. 7.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
8. 8.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
9. 9.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
10. 10.True or false: a pair of pliers is a class 3 lever (effort in the middle). (a) False (b) True
11. 11.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
12. 12.Which of these is an inclined plane? (a) a truck loading ramp (b) a door stopper (c) a claw hammer on a nail (d) a crane hook block
13. 13.⚖️ Turning effect = force × … (a) distance from fulcrum (b) time taken (c) colour of bar (d) mass of fulcrum
14. 14.True or false: a rough doormat gives less friction. (a) True (b) False
15. 15.True or false: a pair of scissors is a class 3 lever (effort in the middle). (a) False (b) True
16. 16.💪 Which force is at work: an apple falls down? (a) magnetic force (b) muscular force (c) friction (d) gravity
17. 17.⚖️ A seesaw balances. Meena (140 N) sits ? m from the pivot on one side; Asha (420 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
18. 18.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
19. 19.💪 In which unit do we measure force? (a) litre (L) (b) metre (m) (c) second (s) (d) newton (N)
20. 20.🏋️ A force of 440 N did 4400 J of work. How many metres did the object move?
21. 21.True or false: a screw jack is an inclined plane. (a) True (b) False
22. 22.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) polished marble (c) sandpaper (d) ice
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, sandpaper 9 N, ice 3 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on ice?
24. 24.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the axle (d) the load
25. 25.⚖️ A lever bar balances. The load is 30 N at 30 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
26. 26.🔍 Which is the odd one out? (a) a smooth steel slide (b) powder on a carrom board (c) skating on ice (d) a box pushed on carpet
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 7 N, a carpet 10 N, ice 4 N. How many newtons more were needed on a carpet than on ice?
28. 28.⚖️ A seesaw balances. Kabir (720 N) sits 1 m from the pivot on one side; Asha (180 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
29. 29.True or false: a well-bucket rope wheel is a wheel and axle. (a) False (b) True
30. 30.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
31. 31.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
32. 32.⚙️ Which simple machine is a flagpole rope wheel? (a) screw (b) lever (c) inclined plane (d) pulley
33. 33.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
34. 34.🔍 Which is the odd one out? (a) a door stopper (b) a seesaw (c) a chisel (d) the tip of a nail
35. 35.🔍 Which is the odd one out? (a) a rough doormat (b) a wheel on ball bearings (c) a tyre with deep treads (d) a box pushed on carpet
36. 36.⚖️ Which class of lever is your forearm? (a) class 3 (b) class 2 (c) class 1
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, a carpet 6 N, sandpaper 9 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) sandpaper
38. 38.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
39. 39.⚖️ What is the pivot point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
40. 40.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a smooth steel slide (c) a rough doormat (d) skating on ice

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