Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 269 · 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.True or false: a tap handle is a wheel and axle. (a) False (b) True
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a crowbar (c) a ramp (d) a bottle opener
4. 4.⚖️ 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 number of coins (d) the kind of coins
5. 5.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a see-saw (d) a slide
6. 6.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) a 30 cm ruler (d) a mirror
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 measure it (b) we change it (c) we keep it the same
8. 8.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a ramp (c) a steering wheel (d) a well pulley
9. 9.True or false: a steering wheel is a wheel and axle. (a) False (b) True
10. 10.True or false: a magnet is needed for the ruler lever. (a) True (b) False
11. 11.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) zero (d) always 10
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) coins of one kind (c) a flat table (d) a round pencil
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 number of coins (b) where the pencil is (c) the same ruler (d) which side goes down
14. 14.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
15. 15.🧺 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) a balloon
16. 16.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
17. 17.⚙️ Which of these is a lever? (a) a tap handle (b) a doorknob (c) a spoon lifting a lid (d) a flagpole
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) yeast (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 number of coins”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) a lever boosts your push (d) the lid gets softer
21. 21.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
22. 22.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
23. 23.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) harder (d) easier
24. 24.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 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?
26. 26.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a flagpole (c) a doorknob (d) a ramp
27. 27.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit on the middle (d) sit farther from middle
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
30. 30.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) True (b) False
32. 32.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
33. 33.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
34. 34.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
35. 35.⚖️ 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 measure it (c) we keep it the same
36. 36.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
37. 37.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
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) neither, it balances (b) the left side (c) the right side (d) both go up
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) yeast (d) coins of one kind
40. 40.⚙️ Which of these uses a pulley? (a) a flagpole (b) a tap handle (c) a steering wheel (d) a doorknob

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