Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 402 · 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.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
2. 2.🏋️ A force of 110 N pushes a cart 10 m along the floor. How much work is done, in joules?
3. 3.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) sandpaper (c) polished marble (d) glass
4. 4.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a rough doormat (c) oil on a squeaky hinge (d) a tyre with deep treads
5. 5.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
6. 6.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
7. 7.True or false: pushing a trolley is a push. (a) False (b) True
8. 8.⚖️ A lever bar balances. The load is 900 N at 10 cm from the fulcrum. The effort is 90 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
9. 9.🏋️ A force of 50 N did 450 J of work. How many metres did the object move?
10. 10.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
11. 11.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
12. 12.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
13. 13.True or false: pulling a cart is a pull. (a) True (b) False
14. 14.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
15. 15.🪝 A pulley system lifts a 220 N load with an effort of 110 N. What is its mechanical advantage (MA)?
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 4 N, a carpet 6 N, sandpaper 10 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
17. 17.True or false: a wet tiled floor gives more friction. (a) True (b) False
18. 18.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
19. 19.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
20. 20.⚖️ A seesaw balances. Zoya (? N) sits 4 m from the pivot on one side; Ravi (640 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
21. 21.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
22. 22.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
23. 23.⚖️ Turning effect = force × … (a) distance from fulcrum (b) mass of fulcrum (c) time taken (d) colour of bar
24. 24.True or false: a well-bucket rope wheel is a lever. (a) True (b) False
25. 25.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
26. 26.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) closer to the pivot (c) on the pivot (d) anywhere
27. 27.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
28. 28.💪 A cart is pulled to the right with 45 N and to the left with 30 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
29. 29.🪝 More rope sections holding a load means … (a) the load floats (b) more effort needed (c) no change (d) less effort needed
30. 30.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a rough doormat (c) a wheel on ball bearings (d) sand on a slippery path
31. 31.💪 Two children push a box to the right, one with 80 N and the other with 55 N. What is the net (total) force on the box, in newtons?
32. 32.🔍 Which is the odd one out? (a) a road up a hill (b) a playground slide (c) a steering wheel (d) a wheelchair ramp
33. 33.True or false: a lemon squeezer is a class 3 lever (effort in the middle). (a) True (b) False
34. 34.🛞 Friction acts … (a) with the motion (b) only on ice (c) only upwards (d) against the motion
35. 35.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 12 N, ice 3 N, a glass sheet 5 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) ice
37. 37.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
38. 38.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to go slower (c) to grip the road (d) to look nice
39. 39.💪 Which force is at work: rain falls to the ground? (a) magnetic force (b) muscular force (c) friction (d) gravity
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 2 N, a glass sheet 3 N, a wooden plank 6 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a glass sheet (d) a wooden plank

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