Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 136 · 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.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the effort (d) the load
2. 2.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
3. 3.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
4. 4.⚖️ 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
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) yeast (d) a round pencil
6. 6.⚖️ 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) the kind of coins (c) distance from the pencil
7. 7.True or false: a ramp is an inclined plane. (a) False (b) True
8. 8.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
9. 9.True or false: a steering wheel is a wheel and axle. (a) True (b) False
10. 10.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
11. 11.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit on the middle (d) sit closer to middle
12. 12.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) bigger on the left (d) zero
13. 13.⚙️ Which of these uses a pulley? (a) a tap handle (b) a spoon lifting a lid (c) a steering wheel (d) a crane
14. 14.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a balloon (d) a flat table
15. 15.True or false: a bottle opener uses a pulley. (a) True (b) False
16. 16.True or false: a bottle opener is a lever. (a) False (b) True
17. 17.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) yeast
20. 20.🛟 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
21. 21.⚖️ 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) where the pencil is (c) which side goes down
22. 22.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
24. 24.⚖️ 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) False (b) True
25. 25.⚖️ 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 keep it the same (b) we measure it (c) we change it
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) both go up (b) the right side (c) neither, it balances (d) the left side
27. 27.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
28. 28.True or false: a slide is a wheel and axle. (a) False (b) True
29. 29.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the spoon is magnetic (d) the lid gets softer
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) a magnet
31. 31.True or false: a balloon is needed for the ruler lever. (a) False (b) True
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a 30 cm ruler (c) coins of one kind (d) a round pencil
33. 33.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a flagpole (d) a bottle opener
34. 34.⚖️ 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) which side goes down (b) distance from the pencil (c) the kind of coins (d) the number of coins
35. 35.⚖️ 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
36. 36.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
37. 37.⚖️ 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?
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a balloon (c) a round pencil (d) coins of one kind
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a mirror (c) a flat table (d) coins of one kind
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a magnet (c) a 30 cm ruler (d) coins of one kind

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