Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 554 · 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.True or false: a see-saw uses a pulley. (a) False (b) True
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) a 30 cm ruler (d) a round pencil
3. 3.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a well pulley (c) a bottle opener (d) a ramp
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is the one thing we change? (a) the kind of coins (b) which side goes down (c) distance from the pencil (d) the number of coins
5. 5.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) a balloon (d) a 30 cm ruler
6. 6.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the effort (d) the axle
7. 7.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) stand on the ruler (d) bend it till it snaps
8. 8.⚖️ 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) where the pencil is (d) which side goes down
9. 9.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a tap handle (c) a ramp (d) a well pulley
10. 10.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
11. 11.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) jump up and down (c) sit farther from middle (d) sit closer to middle
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) which side goes down (c) distance from the pencil
13. 13.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
14. 14.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a sloping road (c) a flagpole (d) a crowbar
15. 15.🔮 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
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we keep it the same (b) we change it (c) we measure it
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a round pencil (d) a 30 cm ruler
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) False (b) True
23. 23.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
24. 24.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is magnetic (d) the spoon is hot
25. 25.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
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 what we measure. (a) False (b) True
27. 27.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a crowbar (c) a bottle opener (d) a well pulley
28. 28.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 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?
30. 30.⚙️ Which of these is a lever? (a) a flagpole (b) a see-saw (c) a sloping road (d) a tap handle
31. 31.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
32. 32.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
33. 33.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
34. 34.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) a round pencil (d) a battery cell
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a flat table (d) coins of one kind
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a battery cell (d) coins of one kind
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a balloon (d) a flat table
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 3 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
39. 39.⚖️ 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 change it (b) we keep it the same (c) we measure it
40. 40.True or false: a tap handle is a wheel and axle. (a) True (b) False

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