Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 516 · 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.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) turmeric powder (c) a round pencil (d) a flat table
2. 2.True or false: a well pulley uses a pulley. (a) False (b) True
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a magnet (d) coins of one kind
4. 4.🛟 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
5. 5.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
6. 6.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the left side (b) neither, it balances (c) both go up (d) the right side
7. 7.⚖️ 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
8. 8.⚙️ Which of these is a wheel and axle? (a) a crane (b) a ramp (c) a steering wheel (d) a sloping road
9. 9.⚖️ 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
10. 10.True or false: a see-saw uses a pulley. (a) True (b) False
11. 11.True or false: a ramp is a lever. (a) True (b) False
12. 12.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
13. 13.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
14. 14.True or false: a well pulley is an inclined plane. (a) True (b) False
15. 15.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
16. 16.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they may swallow them (d) they are magnetic
17. 17.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
18. 18.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
19. 19.True or false: a balloon is needed for the ruler lever. (a) False (b) True
20. 20.⚖️ 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) True (b) False
21. 21.⚖️ 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) True (b) False
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) turmeric powder (c) coins of one kind (d) a 30 cm ruler
24. 24.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) yeast (d) coins of one kind
25. 25.⚖️ 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 measure it (b) we keep it the same (c) we change it
26. 26.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a magnet (c) a mirror (d) yeast
27. 27.🧺 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) a balloon
28. 28.⚖️ 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) the kind of coins (c) which side goes down (d) distance from the pencil
29. 29.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the effort (d) the axle
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
31. 31.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
32. 32.True or false: a magnet is needed for the ruler lever. (a) False (b) True
33. 33.⚖️ 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?
34. 34.⚙️ Which of these is a lever? (a) a bottle opener (b) a tap handle (c) a slide (d) a steering wheel
35. 35.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a balloon (d) coins of one kind
36. 36.⚙️ Which of these is a wheel and axle? (a) a crane (b) a slide (c) a tap handle (d) a flagpole
37. 37.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) sit farther from middle (d) jump up and down
38. 38.⚙️ Which of these uses a pulley? (a) a crowbar (b) a flagpole (c) a steering wheel (d) a slide
39. 39.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) equal on both sides (d) always 10
40. 40.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed

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