Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 436 · 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 the one thing we change. (a) False (b) True
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) a 30 cm ruler (d) a flat table
3. 3.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
4. 4.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
5. 5.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a round pencil (c) a flat table (d) coins of one kind
8. 8.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a magnet
9. 9.True or false: a mirror is needed for the ruler lever. (a) True (b) False
10. 10.⚙️ Which of these is a lever? (a) a crowbar (b) a ramp (c) a well pulley (d) a doorknob
11. 11.⚙️ Which of these is a lever? (a) a see-saw (b) a slide (c) a crane (d) a well pulley
12. 12.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
13. 13.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) yeast (d) a magnet
14. 14.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are too cold (d) they are magnetic
15. 15.True or false: a flagpole uses a pulley. (a) False (b) True
16. 16.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) turmeric powder (d) a round pencil
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 kept the same. (a) False (b) True
19. 19.⚙️ Which of these is a lever? (a) a steering wheel (b) a spoon lifting a lid (c) a well pulley (d) a crane
20. 20.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
21. 21.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
22. 22.⚖️ 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
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
24. 24.⚙️ Which of these uses a pulley? (a) a tap handle (b) a spoon lifting a lid (c) a well pulley (d) a sloping road
25. 25.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a bottle opener (c) a ramp (d) a steering wheel
26. 26.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
27. 27.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
28. 28.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
29. 29.True or false: a steering wheel is a lever. (a) False (b) True
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 8 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a balloon (d) coins of one kind
32. 32.⚖️ 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
33. 33.⚖️ 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 kind of coins (b) distance from the pencil (c) the number of coins (d) where the pencil is
34. 34.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a well pulley (c) a bottle opener (d) a tap handle
35. 35.True or false: a bottle opener is an inclined plane. (a) True (b) False
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 8 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?
37. 37.⚖️ 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?
38. 38.⚖️ 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
39. 39.⚖️ 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) True (b) False
40. 40.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier

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