Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 487 · 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.⚖️ 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
2. 2.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 6 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? True or false: which side goes down is what we measure. (a) False (b) True
5. 5.⚖️ 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
6. 6.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a flagpole (c) a bottle opener (d) a spoon lifting a lid
7. 7.⚖️ 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 10 cm to the right to balance it?
8. 8.⚙️ Which of these is a lever? (a) a ramp (b) a bottle opener (c) a well pulley (d) a sloping road
9. 9.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
10. 10.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
11. 11.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a bottle opener (c) a sloping road (d) a spoon lifting a lid
12. 12.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
13. 13.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) the spoon is hot (d) a lever boosts your push
14. 14.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) turmeric powder (d) a 30 cm ruler
16. 16.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) a 30 cm ruler (d) a mirror
17. 17.True or false: a magnet is needed for the ruler lever. (a) True (b) False
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 5 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?
19. 19.🧺 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 balloon (d) a round pencil
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) yeast (d) a round pencil
21. 21.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
22. 22.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a battery cell (c) coins of one kind (d) turmeric powder
23. 23.True or false: a doorknob is an inclined plane. (a) False (b) True
24. 24.⚙️ Which of these is a lever? (a) a crane (b) a spoon lifting a lid (c) a slide (d) a steering wheel
25. 25.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
26. 26.🔮 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 right side (c) the left side (d) neither, it balances
27. 27.True or false: a slide is a lever. (a) False (b) True
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 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?
29. 29.⚖️ 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) True (b) False
30. 30.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 8 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
32. 32.True or false: a flat table is needed for the ruler lever. (a) False (b) True
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a flat table (c) a 30 cm ruler (d) coins of one kind
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
35. 35.⚖️ 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 change it (c) we keep it the same
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a battery cell (d) coins of one kind
37. 37.⚙️ Which of these is a lever? (a) a well pulley (b) a sloping road (c) a see-saw (d) a tap handle
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 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?
39. 39.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
40. 40.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces

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