Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 661 · 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 a 30 cm ruler for the ruler lever? (a) needed (b) not needed
2. 2.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are too shiny (d) they are magnetic
3. 3.⚖️ 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
4. 4.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
5. 5.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a well pulley (c) a tap handle (d) a doorknob
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
7. 7.⚖️ 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?
8. 8.⚙️ Which of these is a lever? (a) a flagpole (b) a ramp (c) a steering wheel (d) a crowbar
9. 9.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) jump up and down (d) sit farther from middle
10. 10.⚖️ 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
11. 11.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
12. 12.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
13. 13.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a balloon (c) a flat table (d) turmeric powder
14. 14.🛟 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
15. 15.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) yeast (d) coins of one kind
16. 16.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
17. 17.True or false: a tap handle uses a pulley. (a) False (b) True
18. 18.⚖️ 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?
19. 19.⚖️ 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 keep it the same (c) we change it
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
21. 21.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
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 5 coins 4 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
26. 26.🧺 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 30 cm ruler (d) a balloon
27. 27.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
28. 28.⚖️ 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) the lid gets softer (d) a lever boosts your push
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) turmeric powder (d) a 30 cm ruler
30. 30.⚖️ 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) the number of coins (b) the kind of coins (c) where the pencil is (d) distance from the pencil
31. 31.⚙️ Which of these uses a pulley? (a) a tap handle (b) a steering wheel (c) a bottle opener (d) a flagpole
32. 32.⚖️ 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
33. 33.True or false: a flagpole is a wheel and axle. (a) True (b) False
34. 34.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) a 30 cm ruler (d) a mirror
35. 35.⚖️ 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
36. 36.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
37. 37.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
38. 38.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a doorknob (c) a sloping road (d) a bottle opener
39. 39.⚖️ 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?
40. 40.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed

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