Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 305 · 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) coins of one kind (b) a flat table (c) a magnet (d) a round pencil
2. 2.True or false: a slide is an inclined plane. (a) True (b) False
3. 3.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
4. 4.🔮 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 right side (b) both go up (c) the left side (d) neither, it balances
5. 5.⚖️ 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) where the pencil is (c) which side goes down
6. 6.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) turmeric powder
8. 8.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
9. 9.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
10. 10.⚙️ Which of these is a lever? (a) a steering wheel (b) a sloping road (c) a flagpole (d) a spoon lifting a lid
11. 11.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
12. 12.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
13. 13.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
14. 14.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) a magnet (d) a round pencil
15. 15.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
16. 16.⚖️ 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 measure it (b) we change it (c) we keep it the same
17. 17.True or false: a balloon is needed for the ruler lever. (a) True (b) False
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a battery cell (c) a 30 cm ruler (d) a round pencil
19. 19.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
20. 20.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) True (b) False
22. 22.True or false: a tap handle is an inclined plane. (a) True (b) False
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
24. 24.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
25. 25.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
26. 26.🛟 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
27. 27.⚖️ 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 measure it (c) we change it
28. 28.True or false: a tap handle uses a pulley. (a) True (b) False
29. 29.True or false: a see-saw is an inclined plane. (a) False (b) True
30. 30.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
31. 31.⚖️ 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 hot (c) the lid gets softer (d) the spoon is magnetic
32. 32.⚖️ 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
33. 33.⚖️ 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 measure it (c) we change it
34. 34.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
35. 35.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
36. 36.⚙️ Which of these is an inclined plane? (a) a ramp (b) a bottle opener (c) a spoon lifting a lid (d) a tap handle
37. 37.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
38. 38.⚖️ 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) True (b) False
39. 39.True or false: a doorknob is a lever. (a) False (b) True
40. 40.⚖️ 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

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