Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 267 · 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 slide is a wheel and axle. (a) True (b) False
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a ramp (c) a steering wheel (d) a doorknob
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
5. 5.⚖️ 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 keep it the same (b) we change it (c) we measure it
6. 6.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
7. 7.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a ramp (c) a steering wheel (d) a crowbar
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) False (b) True
9. 9.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
10. 10.⚖️ 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?
11. 11.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the spoon is hot (d) the lid gets softer
12. 12.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
13. 13.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
14. 14.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) the right side (d) neither, it balances
15. 15.⚙️ Which of these is a lever? (a) a doorknob (b) a crane (c) a steering wheel (d) a see-saw
16. 16.⚙️ Which of these is a lever? (a) a bottle opener (b) a doorknob (c) a slide (d) a flagpole
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a balloon (c) a 30 cm ruler (d) coins of one kind
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) turmeric powder (c) a 30 cm ruler (d) a round pencil
20. 20.🛟 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
21. 21.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
23. 23.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) jump up and down (c) sit farther from middle (d) sit closer to middle
24. 24.⚖️ 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) which side goes down (d) the kind of coins
25. 25.⚙️ Which of these is a lever? (a) a ramp (b) a crane (c) a well pulley (d) a crowbar
26. 26.⚖️ 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
27. 27.True or false: a mirror is needed for the ruler lever. (a) True (b) False
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a flat table (c) coins of one kind (d) a 30 cm ruler
29. 29.True or false: a bottle opener is a lever. (a) False (b) True
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a flat table (c) coins of one kind (d) a round pencil
31. 31.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a magnet (d) a mirror
32. 32.⚖️ 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
33. 33.⚖️ 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
34. 34.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a 30 cm ruler (c) a balloon (d) a magnet
35. 35.⚖️ 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
36. 36.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
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) where the pencil is
38. 38.True or false: yeast is needed for the ruler lever. (a) True (b) False
39. 39.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
40. 40.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed

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