Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 532 · 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 270 N did 1890 J of work. How many metres did the object move?
2. 2.🏋️ A force of 140 N did 1120 J of work. How many metres did the object move?
3. 3.True or false: pulling a cart is a push. (a) True (b) False
4. 4.True or false: hitting a cricket ball is a pull. (a) False (b) True
5. 5.True or false: a door stopper is a pulley. (a) False (b) True
6. 6.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
7. 7.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
8. 8.⚖️ Which class of lever is a crowbar? (a) class 1 (b) class 2 (c) class 3
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 0 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
10. 10.🔍 Which is the odd one out? (a) a jar lid (b) a screw jack (c) a claw hammer on a nail (d) a wood screw
11. 11.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the size of the load (c) gravity (d) the direction of pull
12. 12.🪝 A winch has a wheel of radius 12 cm and an axle of radius 2 cm. What effort on the wheel lifts a 600 N bucket on the axle, in newtons? (ideal)
13. 13.⚖️ Turning effect = force × … (a) distance from fulcrum (b) time taken (c) mass of fulcrum (d) colour of bar
14. 14.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
15. 15.💪 In which unit do we measure force? (a) second (s) (b) metre (m) (c) newton (N) (d) litre (L)
16. 16.True or false: sand on a slippery path gives less friction. (a) False (b) True
17. 17.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
18. 18.Which of these is a pulley? (a) a crane hook block (b) a playground slide (c) a round doorknob (d) a bottle cap
19. 19.🪝 A bucket weighing 310 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
20. 20.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
21. 21.Which of these is caused by magnetic force? (a) pedalling a cycle (b) squeezing a lemon (c) a thrown ball comes down (d) a magnet picks up pins
22. 22.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
23. 23.⚖️ Which class of lever is a pair of scissors? (a) class 2 (b) class 1 (c) class 3
24. 24.True or false: a flagpole rope wheel is an inclined plane. (a) True (b) False
25. 25.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
26. 26.⚖️ A lever balances when … (a) both weights are equal (b) the bar is short (c) turning effects match (d) the fulcrum moves
27. 27.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
28. 28.🪝 More rope sections holding a load means … (a) less effort needed (b) the load floats (c) more effort needed (d) no change
29. 29.⚙️ A wedge is … (a) two ramps back to back (b) a bar on a pivot (c) a rope on a wheel (d) a wheel on a rod
30. 30.🛞 Friction acts … (a) only on ice (b) only upwards (c) with the motion (d) against the motion
31. 31.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a wet tiled floor (c) a smooth steel slide (d) skating on ice
32. 32.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a glass sheet 7 N, a carpet 8 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a carpet (d) sandpaper
34. 34.⚖️ A seesaw balances. Zoya (520 N) sits 2 m from the pivot on one side; Asha (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
35. 35.⚖️ A seesaw balances. Asha (540 N) sits 4 m from the pivot on one side; Meena (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.💪 Which force is at work: brakes stop a bicycle? (a) muscular force (b) gravity (c) friction (d) magnetic force
37. 37.True or false: a movable pulley is on a flagpole top. (a) True (b) False
38. 38.⚖️ A lever bar balances. The load is 300 N at ? cm from the fulcrum. The effort is 60 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
39. 39.Which of these is caused by friction? (a) shoes grip the floor (b) rain falls to the ground (c) a river flows downhill (d) pedalling a cycle
40. 40.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) closer to the pivot (c) farther from the pivot (d) on the pivot

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