Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 325 · 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.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 10 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
3. 3.⚖️ 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?
4. 4.⚖️ 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 kind of coins (b) the number of coins (c) which side goes down (d) distance from the pencil
5. 5.True or false: a well pulley uses a pulley. (a) False (b) True
6. 6.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) turmeric powder
8. 8.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
9. 9.True or false: a flagpole is an inclined plane. (a) False (b) True
10. 10.⚖️ 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 magnetic (c) the lid gets softer (d) the spoon is hot
11. 11.⚖️ 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) True (b) False
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.True or false: a sloping road uses a pulley. (a) True (b) False
14. 14.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
15. 15.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
16. 16.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
17. 17.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
18. 18.True or false: a ramp uses a pulley. (a) False (b) True
19. 19.⚙️ Which of these is a lever? (a) a doorknob (b) a tap handle (c) a ramp (d) a see-saw
20. 20.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) yeast (d) a magnet
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True
22. 22.True or false: a flagpole uses a pulley. (a) False (b) True
23. 23.⚖️ 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
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a battery cell (c) coins of one kind (d) a round pencil
25. 25.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) bend it till it snaps (d) stand on the ruler
26. 26.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
27. 27.⚖️ 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) distance from the pencil (c) the same ruler (d) which side goes down
28. 28.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a crowbar (c) a sloping road (d) a crane
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
30. 30.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) a magnet (d) yeast
31. 31.⚖️ 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
32. 32.⚙️ Which of these is a lever? (a) a ramp (b) a well pulley (c) a bottle opener (d) a slide
33. 33.⚙️ Which of these is a wheel and axle? (a) a slide (b) a steering wheel (c) a well pulley (d) a spoon lifting a lid
34. 34.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
35. 35.🔮 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 left side (b) both go up (c) neither, it balances (d) the right side
36. 36.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a doorknob (c) a ramp (d) a well pulley
37. 37.⚖️ 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) which side goes down (c) the number of coins
38. 38.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) a flat table (d) a mirror
39. 39.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 5 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?

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