Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 898 · 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: which side goes down is what we measure. (a) True (b) False
2. 2.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a well pulley (c) a flagpole (d) a slide
3. 3.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
4. 4.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) the lid gets softer (d) a lever boosts your push
5. 5.⚙️ Which of these uses a pulley? (a) a tap handle (b) a bottle opener (c) a flagpole (d) a ramp
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) harder (d) easier
9. 9.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
10. 10.⚖️ 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 measure it (b) we change it (c) we keep it the same
11. 11.True or false: a spoon lifting a lid is a lever. (a) True (b) False
12. 12.⚖️ 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 same ruler (b) distance from the pencil (c) the number of coins (d) which side goes down
13. 13.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
14. 14.⚖️ 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
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
16. 16.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
17. 17.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) press it gently (d) stand on the ruler
18. 18.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
19. 19.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) turmeric powder (d) a 30 cm ruler
20. 20.🧺 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 balloon (d) a flat table
21. 21.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) bigger on the left (d) equal on both sides
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 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?
23. 23.True or false: a see-saw is a lever. (a) True (b) False
24. 24.⚖️ 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) False (b) True
25. 25.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
26. 26.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
27. 27.True or false: a flagpole is an inclined plane. (a) True (b) False
28. 28.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
29. 29.True or false: yeast is needed for the ruler lever. (a) True (b) False
30. 30.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a crane (c) a ramp (d) a spoon lifting a lid
31. 31.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
32. 32.True or false: a crane is a lever. (a) True (b) False
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) turmeric powder (d) coins of one kind
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) yeast (d) a 30 cm ruler
35. 35.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
36. 36.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
37. 37.⚙️ Which of these is a lever? (a) a slide (b) a spoon lifting a lid (c) a steering wheel (d) a ramp
38. 38.⚖️ 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
39. 39.⚖️ 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) which side goes down (d) where the pencil is
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 6 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?

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