Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 293 · 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.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
2. 2.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
3. 3.True or false: a crane is a lever. (a) True (b) False
4. 4.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crowbar (c) a doorknob (d) a ramp
5. 5.🛟 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
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) yeast (d) a flat table
7. 7.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
9. 9.⚖️ 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 measure it (b) we keep it the same (c) we change it
10. 10.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
11. 11.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) yeast (d) a mirror
12. 12.⚖️ 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
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a flat table (d) yeast
14. 14.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
15. 15.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) bigger on the left (d) zero
16. 16.⚖️ 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) distance from the pencil (d) which side goes down
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) a battery cell
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) a balloon
19. 19.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
20. 20.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
21. 21.⚙️ Which of these is a lever? (a) a flagpole (b) a slide (c) a steering wheel (d) a crowbar
22. 22.⚙️ Which of these is a lever? (a) a slide (b) a crane (c) a well pulley (d) a see-saw
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a magnet (d) a flat table
24. 24.⚖️ 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) where the pencil is (c) distance from the pencil
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 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?
26. 26.True or false: a ramp is an inclined plane. (a) False (b) True
27. 27.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
28. 28.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) sit farther from middle (d) jump up and down
29. 29.🔮 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) the right side (c) the left side (d) both go up
30. 30.⚙️ Which of these is a lever? (a) a ramp (b) a tap handle (c) a spoon lifting a lid (d) a flagpole
31. 31.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
33. 33.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) a lever boosts your push (d) the spoon is magnetic
34. 34.True or false: a see-saw is a lever. (a) True (b) False
35. 35.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
36. 36.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
37. 37.⚖️ 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) True (b) False
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) the same ruler (b) distance from the pencil (c) which side goes down
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
40. 40.⚖️ 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

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