Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 636 · 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.💪 Which force is at work: shoes grip the floor? (a) gravity (b) magnetic force (c) friction (d) muscular force
2. 2.⚖️ Turning effect = force × … (a) mass of fulcrum (b) distance from fulcrum (c) colour of bar (d) time taken
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, ice 1 N, a glass sheet 3 N. How many newtons more were needed on sandpaper than on ice?
4. 4.Which of these is an inclined plane? (a) a playground slide (b) the tip of a nail (c) an axe blade (d) a window blind cord
5. 5.🔍 Which is the odd one out? (a) chalk on a gym bar (b) sand on a slippery path (c) a grippy rubber sole (d) a wheel on ball bearings
6. 6.🏋️ A force of 40 N pushes a cart 4 m along the floor. How much work is done, in joules?
7. 7.⚙️ Which simple machine is a knife edge? (a) lever (b) screw (c) wedge (d) wheel and axle
8. 8.⚖️ A lever balances when … (a) both weights are equal (b) the fulcrum moves (c) turning effects match (d) the bar is short
9. 9.⚖️ A lever bar balances. The load is 100 N at 20 cm from the fulcrum. The effort is 20 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
10. 10.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 10 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
11. 11.🔍 Which is the odd one out? (a) a crane hook block (b) a knife edge (c) a well-bucket rope wheel (d) a window blind cord
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a wooden plank 5 N, a carpet 8 N. How many newtons more were needed on a carpet than on ice?
13. 13.🛞 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 7 N, sandpaper 9 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) sandpaper
14. 14.⚙️ Which simple machine is a door stopper? (a) inclined plane (b) wedge (c) lever (d) screw
15. 15.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 80 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
16. 16.True or false: a claw hammer on a nail is a screw. (a) True (b) False
17. 17.True or false: a knife edge is a wedge. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) oil on a squeaky hinge (c) sand on a slippery path (d) a smooth steel slide
19. 19.⚖️ Which class of lever is a crowbar? (a) class 1 (b) class 3 (c) class 2
20. 20.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
21. 21.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
22. 22.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
23. 23.⚙️ Which simple machine is a nutcracker? (a) wheel and axle (b) lever (c) inclined plane (d) screw
24. 24.🔍 Which is the odd one out? (a) a bottle cap (b) an axe blade (c) a chisel (d) the tip of a nail
25. 25.⚖️ A lever bar balances. The load is 420 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?
26. 26.🪝 A well winch has a handle (wheel) of radius 40 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
27. 27.⚙️ Which simple machine is an axe blade? (a) lever (b) wedge (c) screw (d) wheel and axle
28. 28.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
29. 29.⚖️ A seesaw balances. Kabir (200 N) sits 1 m from the pivot on one side; Zoya (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
30. 30.🏋️ A force of 490 N did 4410 J of work. How many metres did the object move?
31. 31.💪 Two children push a box to the right, one with 5 N and the other with 5 N. What is the net (total) force on the box, in newtons?
32. 32.True or false: a bottle cap is an inclined plane. (a) False (b) True
33. 33.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 30 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
34. 34.True or false: a round doorknob is a wheel and axle. (a) False (b) True
35. 35.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
36. 36.Which of these is caused by magnetic force? (a) an apple falls down (b) a fridge magnet sticks (c) shoes grip the floor (d) pedalling a cycle
37. 37.True or false: a movable pulley rises with the load. (a) False (b) True
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 80 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a wooden plank 7 N, sandpaper 8 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) ice
40. 40.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1

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