Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 361 · 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.🧺 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) turmeric powder (d) a round pencil
2. 2.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
3. 3.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
4. 4.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
5. 5.⚖️ 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
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 5 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
7. 7.⚖️ 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) False (b) True
8. 8.True or false: a doorknob is a wheel and axle. (a) True (b) False
9. 9.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) yeast (c) coins of one kind (d) a 30 cm ruler
11. 11.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a crane (c) a crowbar (d) a tap handle
12. 12.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
13. 13.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) a magnet (d) yeast
14. 14.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
15. 15.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a mirror (d) a round pencil
16. 16.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit on the middle (d) sit farther from middle
17. 17.⚖️ 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?
18. 18.⚖️ 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) which side goes down (c) distance from the pencil
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) True (b) False
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a balloon
21. 21.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
22. 22.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) bigger on the left (c) always 10 (d) zero
23. 23.⚖️ 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
24. 24.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
26. 26.True or false: a flat table is needed for the ruler lever. (a) False (b) True
27. 27.True or false: a well pulley is a lever. (a) True (b) False
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a battery cell (d) a flat table
29. 29.True or false: a well pulley uses a pulley. (a) True (b) False
30. 30.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
31. 31.⚖️ 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
32. 32.⚖️ 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) False (b) True
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) a 30 cm ruler (d) a round pencil
34. 34.⚖️ 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 change it (c) we keep it the same
35. 35.True or false: a crane uses a pulley. (a) True (b) False
36. 36.⚖️ 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 number of coins (b) the kind of coins (c) where the pencil is (d) distance from the pencil
37. 37.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a mirror (d) a magnet
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
39. 39.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
40. 40.True or false: a ramp is an inclined plane. (a) True (b) False

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