Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 155 · 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 round pencil (b) a balloon (c) a 30 cm ruler (d) coins of one kind
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) True (b) False
3. 3.🧺 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) a flat table (d) a mirror
4. 4.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are too cold (d) they are magnetic
5. 5.⚖️ 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 keep it the same (c) we measure it
6. 6.⚖️ 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 same ruler (b) the number of coins (c) which side goes down (d) distance from the pencil
7. 7.⚖️ 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
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
10. 10.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
11. 11.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
12. 12.⚖️ 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 change it (b) we keep it the same (c) we measure it
13. 13.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
14. 14.True or false: a well pulley uses a pulley. (a) True (b) False
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 10 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?
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a flat table (c) coins of one kind (d) a 30 cm ruler
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
18. 18.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a mirror (c) yeast (d) turmeric powder
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the kind of coins (b) which side goes down (c) distance from the pencil
20. 20.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
21. 21.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) turmeric powder (d) a round pencil
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 8 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 12 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
25. 25.⚖️ 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
26. 26.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
27. 27.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) bend it till it snaps (d) flick coins at faces
28. 28.True or false: a see-saw uses a pulley. (a) False (b) True
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 kept the same. (a) False (b) True
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
31. 31.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a crowbar (c) a ramp (d) a steering wheel
32. 32.True or false: a crowbar is a lever. (a) False (b) True
33. 33.⚙️ Which of these is an inclined plane? (a) a crane (b) a steering wheel (c) a slide (d) a see-saw
34. 34.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a tap handle (c) a crowbar (d) a well pulley
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 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?
36. 36.True or false: a magnet is needed for the ruler lever. (a) False (b) True
37. 37.True or false: a doorknob is a lever. (a) False (b) True
38. 38.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
39. 39.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) yeast (d) turmeric powder
40. 40.True or false: a crane uses a pulley. (a) True (b) False

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