Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 737 · 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.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a balloon (c) turmeric powder (d) coins of one kind
3. 3.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
5. 5.⚙️ Which of these uses a pulley? (a) a doorknob (b) a slide (c) a tap handle (d) a well pulley
6. 6.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) jump up and down (d) sit farther from middle
7. 7.⚙️ Which of these uses a pulley? (a) a flagpole (b) a bottle opener (c) a sloping road (d) a spoon lifting a lid
8. 8.⚖️ 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?
9. 9.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
10. 10.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
11. 11.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
12. 12.⚖️ 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?
13. 13.⚖️ 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
14. 14.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
15. 15.True or false: a flagpole is a lever. (a) True (b) False
16. 16.⚖️ 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) the kind of coins
17. 17.⚖️ 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 measure it (c) we keep it the same
18. 18.⚖️ 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) True (b) False
19. 19.⚖️ 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
20. 20.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) flick coins at faces (d) bend it till it snaps
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
22. 22.True or false: a see-saw is a lever. (a) False (b) True
23. 23.🧺 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
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
25. 25.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) the spoon is hot (d) a lever boosts your push
26. 26.🔮 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 right side (b) neither, it balances (c) both go up (d) the left side
27. 27.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a crowbar (c) a slide (d) a bottle opener
28. 28.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a 30 cm ruler (c) yeast (d) a mirror
29. 29.⚙️ Which of these is a wheel and axle? (a) a slide (b) a flagpole (c) a tap handle (d) a bottle opener
30. 30.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
31. 31.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
32. 32.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 3 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.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
35. 35.True or false: a bottle opener is a lever. (a) False (b) True
36. 36.🧺 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 round pencil (d) a battery cell
37. 37.True or false: a crane uses a pulley. (a) False (b) True
38. 38.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
39. 39.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) the same (d) harder
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?

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