Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 833 · 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 balloon for the ruler lever? (a) needed (b) not needed
2. 2.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) flick coins at faces (d) stand on the ruler
3. 3.⚖️ 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
4. 4.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
5. 5.⚙️ Which of these is a lever? (a) a crane (b) a doorknob (c) a well pulley (d) a spoon lifting a lid
6. 6.⚖️ 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?
7. 7.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
8. 8.⚖️ 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) distance from the pencil (c) the kind of coins (d) which side goes down
9. 9.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a tap handle (c) a doorknob (d) a crane
10. 10.🧺 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 mirror
11. 11.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) jump up and down (d) sit on the middle
12. 12.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) harder (d) impossible
13. 13.True or false: a flat table is needed for the ruler lever. (a) False (b) True
14. 14.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
15. 15.True or false: a spoon lifting a lid is a lever. (a) True (b) False
16. 16.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a bottle opener (c) a slide (d) a doorknob
17. 17.⚖️ 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
18. 18.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) a balloon (d) a magnet
19. 19.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a mirror (c) a round pencil (d) a 30 cm ruler
20. 20.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the spoon is magnetic (c) the lid gets softer (d) a lever boosts your push
21. 21.⚙️ Which of these is a lever? (a) a see-saw (b) a sloping road (c) a doorknob (d) a ramp
22. 22.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
23. 23.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a battery cell (c) a round pencil (d) a 30 cm ruler
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) yeast (c) a 30 cm ruler (d) a flat table
25. 25.⚖️ 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
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
27. 27.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
28. 28.True or false: a tap handle is a wheel and axle. (a) True (b) False
29. 29.⚖️ 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 keep it the same (c) we measure it
30. 30.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
31. 31.True or false: a mirror is needed for the ruler lever. (a) True (b) False
32. 32.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
34. 34.True or false: a magnet is needed for the ruler lever. (a) False (b) True
35. 35.⚖️ 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 keep it the same (b) we change it (c) we measure it
36. 36.⚖️ 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) True (b) False
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a flat table (c) a 30 cm ruler (d) a round pencil
38. 38.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a flat table (d) a battery cell
39. 39.⚙️ Which of these uses a pulley? (a) a doorknob (b) a sloping road (c) a tap handle (d) a flagpole
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 3 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?

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