Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 135 · 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.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a sloping road (c) a slide (d) a doorknob
2. 2.⚙️ Which of these is a lever? (a) a slide (b) a steering wheel (c) a tap handle (d) a spoon lifting a lid
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
4. 4.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
5. 5.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the right side (d) the left side
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a flat table (c) a round pencil (d) coins of one kind
7. 7.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
8. 8.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
9. 9.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) False (b) True
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) a battery cell
12. 12.⚖️ 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?
13. 13.⚖️ 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 same ruler (b) which side goes down (c) the kind of coins (d) the number of coins
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 1 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
15. 15.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a balloon (d) a 30 cm ruler
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) the number of coins (b) which side goes down (c) distance from the pencil
18. 18.🧺 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 mirror (d) a flat table
19. 19.⚖️ 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 measure it (b) we change it (c) we keep it the same
20. 20.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 2 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.True or false: a sloping road is an inclined plane. (a) False (b) True
23. 23.🧺 Do we need a mirror 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? 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 same ruler
25. 25.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) press it gently (d) stand on the ruler
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) False (b) True
27. 27.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are too shiny (d) they are magnetic
28. 28.⚖️ 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 measure it (b) we keep it the same (c) we change it
29. 29.⚙️ Which of these is a lever? (a) a ramp (b) a slide (c) a crowbar (d) a tap handle
30. 30.True or false: a spoon lifting a lid is a lever. (a) False (b) True
31. 31.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
32. 32.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 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?
34. 34.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) yeast (d) a 30 cm ruler
35. 35.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True
37. 37.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
38. 38.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
40. 40.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a tap handle (c) a doorknob (d) a slide

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