Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 732 · 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.🏋️ A force of 410 N did 410 J of work. How many metres did the object move?
2. 2.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
3. 3.True or false: the tip of a nail is a wedge. (a) True (b) False
4. 4.💪 A bag has a mass of 24 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
5. 5.⚖️ A seesaw balances. Zoya (200 N) sits 3 m from the pivot on one side; Asha (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
7. 7.True or false: a pair of scissors is a class 1 lever (fulcrum in the middle). (a) True (b) False
8. 8.⚖️ What is the pivot point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
9. 9.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
10. 10.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
11. 11.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
12. 12.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
13. 13.Which of these is a pulley? (a) a round doorknob (b) a crowbar (c) a bottle cap (d) a window blind cord
14. 14.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
15. 15.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
16. 16.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
17. 17.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the size of the load (c) the colour of rope (d) gravity
18. 18.🔍 Which is the odd one out? (a) chalk on a gym bar (b) powder on a carrom board (c) a wheel on ball bearings (d) oil on a squeaky hinge
19. 19.Which of these is a lever? (a) a knife edge (b) a bottle cap (c) a crowbar (d) a wood screw
20. 20.💪 A force is a … (a) kind of colour (b) unit of time (c) push or a pull (d) type of sound
21. 21.🪝 A winch has a wheel of radius 15 cm and an axle of radius 5 cm. What effort on the wheel lifts a 420 N bucket on the axle, in newtons? (ideal)
22. 22.🔍 Which is the odd one out? (a) a road up a hill (b) a flagpole rope wheel (c) a playground slide (d) a truck loading ramp
23. 23.⚖️ A lever bar balances. The load is 630 N at 50 cm from the fulcrum. The effort is 350 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
24. 24.🏋️ A force of 290 N did 870 J of work. How many metres did the object move?
25. 25.⚙️ Which simple machine is a flagpole rope wheel? (a) screw (b) inclined plane (c) pulley (d) wedge
26. 26.Which of these is caused by muscular force? (a) a thrown ball comes down (b) a rolling ball slows (c) rain falls to the ground (d) pedalling a cycle
27. 27.⚖️ A lever bar balances. The load is 600 N at 20 cm from the fulcrum. The effort is 200 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
28. 28.Which of these is a lever? (a) a bottle cap (b) a door stopper (c) a water tap handle (d) a seesaw
29. 29.🪝 A pulley system lifts a 60 N load with an effort of 30 N. What is its mechanical advantage (MA)?
30. 30.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
31. 31.⚖️ A seesaw balances. Ravi (160 N) sits ? m from the pivot on one side; Asha (480 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
32. 32.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) add sand (c) make parts rough (d) press parts harder
33. 33.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) time taken (d) distance from fulcrum
34. 34.💪 Which force is at work: lifting a school bag? (a) friction (b) magnetic force (c) gravity (d) muscular force
35. 35.Which of these is a wedge? (a) a jar lid (b) a nutcracker (c) a door stopper (d) a crowbar
36. 36.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 90 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
37. 37.🛞 Friction acts … (a) only on ice (b) only upwards (c) with the motion (d) against the motion
38. 38.⚖️ A seesaw balances. Asha (760 N) sits ? m from the pivot on one side; Arjun (190 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
39. 39.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
40. 40.⚙️ Which simple machine is a wood screw? (a) screw (b) wedge (c) inclined plane (d) pulley

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