Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 559 · 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.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
2. 2.🏋️ A force of 440 N did 3080 J of work. How many metres did the object move?
3. 3.🪝 A bucket weighing 500 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
4. 4.⚖️ A lever bar balances. The load is 180 N at 50 cm from the fulcrum. The effort is ? N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
5. 5.Which of these is a wedge? (a) a playground slide (b) an axe blade (c) a crane hook block (d) a bottle cap
6. 6.True or false: pulling a cart is a pull. (a) True (b) False
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 10 N, sandpaper 12 N, a glass sheet 2 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) a carpet
8. 8.Which of these is a screw? (a) a steering wheel (b) a jar lid (c) a crowbar (d) a well winch handle
9. 9.🪝 A pulley system lifts a 200 N load with an effort of 100 N. What is its mechanical advantage (MA)?
10. 10.🔍 Which is the odd one out? (a) a wood screw (b) a screw jack (c) a nut and bolt (d) a road up a hill
11. 11.🪝 More rope sections holding a load means … (a) the load floats (b) less effort needed (c) more effort needed (d) no change
12. 12.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wheel on ball bearings (c) a box pushed on carpet (d) a wet tiled floor
13. 13.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) skating on ice (c) a grippy rubber sole (d) oil on a squeaky hinge
14. 14.⚙️ A screw is really … (a) a tiny pulley (b) a bent lever (c) a ramp wrapped round (d) a kind of wheel
15. 15.⚖️ A lever bar balances. The load is 490 N at 40 cm from the fulcrum. The effort is 280 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
16. 16.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a sharp wedge (c) a loose rope (d) a smaller rod (axle)
17. 17.⚙️ Which simple machine is a nutcracker? (a) screw (b) wedge (c) wheel and axle (d) lever
18. 18.💪 Which force is at work: brakes stop a bicycle? (a) muscular force (b) gravity (c) friction (d) magnetic force
19. 19.💪 In which unit do we measure force? (a) newton (N) (b) metre (m) (c) litre (L) (d) second (s)
20. 20.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
21. 21.🪝 What does a single fixed pulley change? (a) gravity (b) the colour of rope (c) the size of the load (d) the direction of pull
22. 22.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 80 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
23. 23.True or false: skating on ice gives more friction. (a) False (b) True
24. 24.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
25. 25.⚖️ A lever bar balances. The load is 180 N at 50 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
26. 26.⚖️ A lever bar balances. The load is 720 N at 40 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
27. 27.⚖️ A seesaw balances. Arjun (480 N) sits 4 m from the pivot on one side; Zoya (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
28. 28.🔍 Which is the odd one out? (a) a window blind cord (b) a well-bucket rope wheel (c) a seesaw (d) a crane hook block
29. 29.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
30. 30.⚖️ Which class of lever is a crowbar? (a) class 3 (b) class 1 (c) class 2
31. 31.Which of these is a lever? (a) a jar lid (b) a screw jack (c) a road up a hill (d) a crowbar
32. 32.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) time taken (d) distance from fulcrum
33. 33.⚙️ Which simple machine is a door stopper? (a) wheel and axle (b) inclined plane (c) wedge (d) screw
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a carpet 4 N, sandpaper 5 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
35. 35.⚖️ A seesaw balances. Kabir (560 N) sits ? m from the pivot on one side; Meena (280 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
36. 36.⚖️ A seesaw balances. Arjun (280 N) sits 3 m from the pivot on one side; Asha (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
37. 37.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) far from the fulcrum (b) on the rock (c) near the fulcrum (d) on the fulcrum
38. 38.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) on the pivot (c) closer to the pivot (d) anywhere
39. 39.⚖️ A lever bar balances. The load is 800 N at 30 cm from the fulcrum. The effort is ? N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.Which of these is caused by gravity? (a) shoes grip the floor (b) brakes stop a bicycle (c) rubbing hands warms them (d) rain falls to the ground

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids