Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 791 · 40 questions

What you do (Coins × distance): 1. Balance the ruler on the pencil at its 15 cm mark. 2. Put coins at a measured distance on the left side. 3. Place coins on the right and slide them until the ruler balances. 4. Check: coins × distance on the left = coins × distance on the right; press gently.

1. 1.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
2. 2.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) turmeric powder (c) a 30 cm ruler (d) a round pencil
3. 3.True or false: a sloping road is a wheel and axle. (a) False (b) True
4. 4.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) bigger on the left (d) equal on both sides
5. 5.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) True (b) False
8. 8.⚙️ Which of these is a lever? (a) a sloping road (b) a flagpole (c) a slide (d) a see-saw
9. 9.⚙️ Which of these uses a pulley? (a) a ramp (b) a well pulley (c) a see-saw (d) a sloping road
10. 10.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
11. 11.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
12. 12.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
13. 13.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) True (b) False
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) a flat table (d) coins of one kind
18. 18.True or false: a spoon lifting a lid is a lever. (a) False (b) True
19. 19.True or false: a bottle opener is an inclined plane. (a) False (b) True
20. 20.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a balloon (c) a magnet (d) coins of one kind
21. 21.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
23. 23.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
24. 24.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) a mirror
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) True (b) False
27. 27.True or false: a well pulley uses a pulley. (a) True (b) False
28. 28.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
29. 29.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
30. 30.True or false: a flagpole is a wheel and axle. (a) False (b) True
31. 31.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) a 30 cm ruler (d) yeast
32. 32.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a spoon lifting a lid (c) a well pulley (d) a ramp
33. 33.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a crane (c) a sloping road (d) a well pulley
34. 34.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a magnet (d) a flat table
35. 35.⚙️ Which of these is a lever? (a) a well pulley (b) a sloping road (c) a spoon lifting a lid (d) a doorknob
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
37. 37.True or false: a crowbar is a wheel and axle. (a) True (b) False
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the number of coins (b) distance from the pencil (c) which side goes down (d) where the pencil is
39. 39.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the right side (c) the left side (d) neither, it balances
40. 40.True or false: a see-saw is a lever. (a) False (b) True

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