Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 962 · 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.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the spoon is hot (d) the lid gets softer
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
3. 3.True or false: a flat table is needed for the ruler lever. (a) False (b) True
4. 4.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
5. 5.True or false: a well pulley is a wheel and axle. (a) True (b) False
6. 6.⚖️ 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
7. 7.⚖️ 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) True (b) False
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) distance from the pencil (b) the kind of coins (c) the number of coins (d) which side goes down
9. 9.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crane (c) a see-saw (d) a crowbar
10. 10.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
12. 12.True or false: a crane is a wheel and axle. (a) True (b) False
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) a battery cell
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
16. 16.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a round pencil (c) a magnet (d) yeast
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) where the pencil is
18. 18.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they are too cold (d) they may swallow them
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) easier (d) the same
22. 22.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
23. 23.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
24. 24.⚖️ 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 keep it the same (c) we change it
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a mirror
26. 26.⚖️ 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) distance from the pencil (b) the number of coins (c) the same ruler (d) the kind of coins
27. 27.⚙️ Which of these is a lever? (a) a well pulley (b) a see-saw (c) a tap handle (d) a ramp
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 10 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
29. 29.⚙️ Which of these uses a pulley? (a) a crowbar (b) a doorknob (c) a see-saw (d) a well pulley
30. 30.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
31. 31.🛟 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
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a battery cell (d) a flat table
33. 33.⚖️ 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
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the kind of coins (b) distance from the pencil (c) which side goes down
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
36. 36.🔮 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 left side (c) neither, it balances (d) the right side
37. 37.True or false: a flagpole is a lever. (a) True (b) False
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
39. 39.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids