Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 484 · 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 mirror for the ruler lever? (a) needed (b) not needed
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
3. 3.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
4. 4.True or false: a ramp is an inclined plane. (a) False (b) True
5. 5.⚖️ 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 kind of coins (b) the same ruler (c) which side goes down (d) distance from the pencil
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) a flat table (d) a 30 cm ruler
7. 7.⚖️ 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 change it (b) we keep it the same (c) we measure it
8. 8.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
9. 9.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 12 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) flick coins at faces (d) press it gently
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) a battery cell
13. 13.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) the spoon is hot (d) a lever boosts your push
14. 14.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a flagpole (c) a ramp (d) a spoon lifting a lid
15. 15.⚖️ 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) where the pencil is (b) the kind of coins (c) the number of coins (d) distance from the pencil
16. 16.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the load (d) the effort
17. 17.True or false: a sloping road is a lever. (a) True (b) False
18. 18.⚖️ 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
19. 19.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a see-saw (c) a flagpole (d) a sloping road
20. 20.⚖️ 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
21. 21.⚙️ Which of these uses a pulley? (a) a tap handle (b) a slide (c) a crane (d) a see-saw
22. 22.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
23. 23.⚖️ 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
24. 24.True or false: a see-saw uses a pulley. (a) True (b) False
25. 25.⚖️ 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) False (b) True
26. 26.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) yeast
27. 27.🔮 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
28. 28.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
29. 29.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
30. 30.True or false: a steering wheel uses a pulley. (a) False (b) True
31. 31.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a flagpole (c) a crane (d) a doorknob
32. 32.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
33. 33.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
34. 34.True or false: a well pulley is a wheel and axle. (a) True (b) False
35. 35.⚙️ Which of these is a lever? (a) a slide (b) a spoon lifting a lid (c) a steering wheel (d) a ramp
36. 36.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) yeast (c) a mirror (d) turmeric powder
37. 37.⚖️ 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) False (b) True
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a battery cell (d) a round pencil
39. 39.⚖️ 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 change it (b) we keep it the same (c) we measure it
40. 40.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True

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