Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 470 · 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.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) on the fulcrum (c) near the fulcrum (d) far from the fulcrum
2. 2.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) less effort needed (d) no change
3. 3.🛞 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 11 N. How many newtons more were needed on sandpaper than on ice?
4. 4.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) turning effects match (d) both weights are equal
5. 5.💪 In a tug of war, one team pulls right with 50 N and the other pulls left with 10 N. What is the size of the net force, in newtons?
6. 6.🏋️ A force of 200 N pushes a cart 9 m along the floor. How much work is done, in joules?
7. 7.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a box pushed on carpet (c) a wet tiled floor (d) sand on a slippery path
8. 8.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 50 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
9. 9.⚙️ Which simple machine is a seesaw? (a) pulley (b) lever (c) wheel and axle (d) inclined plane
10. 10.⚖️ Which class of lever is a wheelbarrow? (a) class 1 (b) class 3 (c) class 2
11. 11.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
12. 12.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the effort (c) the load (d) the fulcrum
13. 13.⚙️ Most simple machines make work easier by letting us … (a) use a smaller force (b) stop all friction (c) switch off gravity (d) make new energy
14. 14.True or false: a tug of war is a pull. (a) False (b) True
15. 15.True or false: a lemon squeezer is a class 1 lever (fulcrum in the middle). (a) True (b) False
16. 16.True or false: a pair of kitchen tongs is a class 3 lever (effort in the middle). (a) False (b) True
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 2 N, a carpet 4 N, sandpaper 7 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
18. 18.True or false: closing a drawer is a push. (a) False (b) True
19. 19.True or false: a claw hammer on a nail is a wheel and axle. (a) True (b) False
20. 20.⚖️ A lever bar balances. The load is 200 N at ? cm from the fulcrum. The effort is 150 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) True (b) False
22. 22.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) gravity (c) doubled (d) unbalanced
23. 23.💪 In which unit do we measure force? (a) metre (m) (b) second (s) (c) litre (L) (d) newton (N)
24. 24.⚖️ A seesaw balances. Meena (100 N) sits ? m from the pivot on one side; Arjun (300 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
25. 25.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
26. 26.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
27. 27.⚖️ A lever bar balances. The load is 300 N at 50 cm from the fulcrum. The effort is 500 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
28. 28.🪝 A pulley system lifts a 220 N load with an effort of 110 N. What is its mechanical advantage (MA)?
29. 29.True or false: kicking a football is a pull. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) a truck loading ramp (b) a bottle opener (c) a playground slide (d) a wheelchair ramp
31. 31.⚖️ Which class of lever is a bottle opener? (a) class 1 (b) class 3 (c) class 2
32. 32.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
33. 33.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
34. 34.⚖️ A seesaw balances. Meena (400 N) sits 3 m from the pivot on one side; Arjun (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
35. 35.True or false: a bottle opener is a screw. (a) False (b) True
36. 36.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
37. 37.⚖️ Along a straight bar, measured from the left end, the effort is at 80 cm, the fulcrum at 20 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
38. 38.🏋️ A force of 310 N pushes a cart 1 m along the floor. How much work is done, in joules?
39. 39.True or false: a beam balance is a class 1 lever (fulcrum in the middle). (a) True (b) False
40. 40.Which of these is a screw? (a) a road up a hill (b) a flagpole rope wheel (c) a seesaw (d) a wood screw

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