Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 339 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) yeast (d) a round pencil
2. 2.⚖️ 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 measure it (c) we change it
3. 3.🛟 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
4. 4.⚙️ Which of these uses a pulley? (a) a doorknob (b) a steering wheel (c) a crane (d) a sloping road
5. 5.⚖️ 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
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a balloon
7. 7.⚖️ 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 change it (b) we keep it the same (c) we measure it
8. 8.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a doorknob (c) a slide (d) a well pulley
9. 9.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they may swallow them (d) they are magnetic
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 what we measure. (a) False (b) True
11. 11.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) the spoon is magnetic (d) a lever boosts your push
12. 12.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
13. 13.True or false: a crane uses a pulley. (a) False (b) True
14. 14.⚙️ Which of these uses a pulley? (a) a ramp (b) a steering wheel (c) a see-saw (d) a well pulley
15. 15.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
16. 16.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a magnet (d) a 30 cm ruler
18. 18.⚖️ 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 number of coins (c) which side goes down (d) the kind of coins
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
20. 20.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a crowbar (d) a crane
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a mirror (c) a round pencil (d) a 30 cm ruler
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
24. 24.True or false: a spoon lifting a lid is a lever. (a) False (b) True
25. 25.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a battery cell (c) a 30 cm ruler (d) coins of one kind
27. 27.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a sloping road (c) a spoon lifting a lid (d) a bottle opener
28. 28.True or false: a steering wheel is a wheel and axle. (a) True (b) False
29. 29.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a mirror (d) a balloon
30. 30.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 10 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
32. 32.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
33. 33.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
34. 34.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
35. 35.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
36. 36.True or false: a crane is a wheel and axle. (a) True (b) False
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a flat table (c) a round pencil (d) coins of one kind
38. 38.🔮 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
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 kept the same. (a) False (b) True
40. 40.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) turmeric powder (d) coins of one kind

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