Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 616 · 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 coins of one kind for the ruler lever? (a) needed (b) not needed
2. 2.⚖️ 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 keep it the same (b) we change it (c) we measure it
3. 3.⚙️ Which of these is a lever? (a) a steering wheel (b) a spoon lifting a lid (c) a sloping road (d) a crane
4. 4.True or false: a crane is a wheel and axle. (a) True (b) False
5. 5.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
6. 6.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) stand on the ruler (d) bend it till it snaps
7. 7.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a doorknob (c) a crowbar (d) a well pulley
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) harder (d) impossible
9. 9.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) coins of one kind (d) a 30 cm ruler
11. 11.⚖️ 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 change it (b) we keep it the same (c) we measure it
12. 12.⚖️ 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
13. 13.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the left side (b) both go up (c) neither, it balances (d) the right side
14. 14.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
15. 15.⚙️ Which of these uses a pulley? (a) a ramp (b) a sloping road (c) a well pulley (d) a spoon lifting a lid
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
17. 17.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
18. 18.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) coins of one kind (c) a flat table (d) a round pencil
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a mirror (c) a flat table (d) a round pencil
22. 22.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
23. 23.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
24. 24.True or false: a see-saw is an inclined plane. (a) True (b) False
25. 25.⚖️ 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
26. 26.True or false: a see-saw uses a pulley. (a) True (b) False
27. 27.⚖️ 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 kind of coins (c) the number of coins (d) the same ruler
28. 28.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) a 30 cm ruler (d) a mirror
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a battery cell (c) coins of one kind (d) a 30 cm ruler
30. 30.True or false: a ramp is an inclined plane. (a) True (b) False
31. 31.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
32. 32.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
35. 35.True or false: yeast is needed for the ruler lever. (a) False (b) True
36. 36.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) where the pencil is
38. 38.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
39. 39.True or false: a bottle opener is a lever. (a) True (b) False
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False

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