Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 262 · 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 spoon lifting a lid is an inclined plane. (a) True (b) False
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a battery cell (d) coins of one kind
3. 3.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
4. 4.True or false: a tap handle 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 the one thing we change? (a) the same ruler (b) the number of coins (c) the kind of coins (d) distance from the pencil
6. 6.⚖️ 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) distance from the pencil (c) the number of coins
7. 7.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
8. 8.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 10 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?
10. 10.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
11. 11.⚖️ 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 change it (c) we measure it
12. 12.True or false: a flagpole uses a pulley. (a) True (b) False
13. 13.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
14. 14.True or false: a crane is a lever. (a) False (b) True
15. 15.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
16. 16.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
17. 17.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a flat table (c) a 30 cm ruler (d) coins of one kind
18. 18.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
19. 19.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) flick coins at faces (d) bend it till it snaps
20. 20.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) 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 kept the same. (a) False (b) True
22. 22.⚙️ Which of these uses a pulley? (a) a crowbar (b) a sloping road (c) a crane (d) a bottle opener
23. 23.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a ramp (c) a bottle opener (d) a well pulley
24. 24.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
25. 25.⚖️ 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 keep it the same (c) we measure it
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
27. 27.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
28. 28.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are too shiny (d) they are magnetic
29. 29.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
30. 30.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a magnet (d) a round pencil
31. 31.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a crowbar (c) a spoon lifting a lid (d) a bottle opener
32. 32.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
33. 33.⚖️ 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?
34. 34.True or false: a tap handle is a wheel and axle. (a) False (b) True
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 what we measure. (a) True (b) False
36. 36.⚖️ 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 keep it the same (c) we change it
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
38. 38.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a round pencil (c) a 30 cm ruler (d) a flat table
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the number of coins (c) the same ruler (d) the kind of coins

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