Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 239 · 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.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
2. 2.True or false: a crowbar is a lever. (a) False (b) True
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
4. 4.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a battery cell (c) a magnet (d) a 30 cm ruler
5. 5.True or false: a flagpole is a wheel and axle. (a) True (b) False
6. 6.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a steering wheel (d) a doorknob
7. 7.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a flat table (c) yeast (d) a mirror
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) coins of one kind (d) a 30 cm ruler
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) the number of coins (c) distance from the pencil (d) which side goes down
10. 10.True or false: a tap handle is a wheel and axle. (a) True (b) False
11. 11.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is hot (d) the spoon is magnetic
12. 12.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
13. 13.True or false: a balloon is needed for the ruler lever. (a) False (b) True
14. 14.⚖️ 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) distance from the pencil (c) the number of coins (d) the same ruler
15. 15.⚖️ 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 change it (b) we keep it the same (c) we measure it
16. 16.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
17. 17.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a bottle opener (c) a sloping road (d) a flagpole
18. 18.⚖️ 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
19. 19.True or false: a mirror is needed for the ruler lever. (a) False (b) True
20. 20.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a 30 cm ruler (d) a flat table
21. 21.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
22. 22.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
23. 23.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
24. 24.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a tap handle (c) a slide (d) a doorknob
25. 25.⚖️ 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 keep it the same (b) we change it (c) we measure it
26. 26.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the left side (d) the right side
27. 27.⚖️ 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 keep it the same (c) we change it
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 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?
29. 29.⚖️ 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
30. 30.⚖️ 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
31. 31.True or false: a sloping road is an inclined plane. (a) False (b) True
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a magnet (c) a flat table (d) a 30 cm ruler
33. 33.⚖️ 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) True (b) False
34. 34.True or false: a crowbar uses a pulley. (a) False (b) True
35. 35.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
36. 36.True or false: a well pulley is an inclined plane. (a) False (b) True
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
38. 38.🧺 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 30 cm ruler (d) yeast
39. 39.True or false: a flat table is needed for the ruler lever. (a) False (b) True
40. 40.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed

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