Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 623 · 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 bottle opener is an inclined plane. (a) False (b) True
2. 2.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit closer to middle (d) sit on the middle
3. 3.True or false: yeast is not needed for the ruler lever. (a) False (b) True
4. 4.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) the spoon is magnetic (d) a lever boosts your push
5. 5.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
6. 6.🧺 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 round pencil (d) a balloon
7. 7.⚙️ Which of these uses a pulley? (a) a crowbar (b) a spoon lifting a lid (c) a flagpole (d) a bottle opener
8. 8.True or false: a flagpole is a wheel and axle. (a) True (b) False
9. 9.⚙️ Which of these is a lever? (a) a tap handle (b) a see-saw (c) a crane (d) a well pulley
10. 10.🔮 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) neither, it balances (c) the right side (d) both go up
11. 11.True or false: a mirror is needed for the ruler lever. (a) False (b) True
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
13. 13.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
14. 14.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) True (b) False
16. 16.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a battery cell (d) yeast
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) which side goes down (b) the number of coins (c) distance from the pencil
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) True (b) False
19. 19.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a well pulley (c) a steering wheel (d) a spoon lifting a lid
20. 20.True or false: a slide is an inclined plane. (a) True (b) False
21. 21.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil (d) the kind of coins
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a magnet (d) a 30 cm ruler
23. 23.⚖️ 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 kind of coins
24. 24.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a crane (c) a bottle opener (d) a sloping road
25. 25.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a round pencil (d) a flat table
26. 26.True or false: a steering wheel is a wheel and axle. (a) True (b) False
27. 27.True or false: a magnet is needed for the ruler lever. (a) True (b) False
28. 28.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) yeast (c) a balloon (d) turmeric powder
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
31. 31.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
32. 32.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
33. 33.True or false: a ramp uses a pulley. (a) False (b) True
34. 34.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
35. 35.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
36. 36.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
37. 37.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
38. 38.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
39. 39.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
40. 40.⚖️ 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) the same ruler (c) the kind of coins (d) distance from the pencil

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