Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 360 · 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.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
2. 2.⚖️ 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) distance from the pencil (c) where the pencil is (d) the kind of coins
3. 3.True or false: a flagpole uses a pulley. (a) True (b) False
4. 4.⚖️ 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 measure it (c) we keep it the same
5. 5.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
6. 6.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
7. 7.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
8. 8.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
9. 9.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
10. 10.⚖️ 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
11. 11.⚖️ 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 kind of coins (c) which side goes down (d) distance from the pencil
12. 12.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
13. 13.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
14. 14.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) harder (d) the same
15. 15.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a balloon (c) a round pencil (d) yeast
16. 16.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
17. 17.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
18. 18.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) a lever boosts your push (d) the spoon is magnetic
19. 19.True or false: a slide uses a pulley. (a) True (b) False
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) a mirror
22. 22.⚙️ Which of these uses a pulley? (a) a sloping road (b) a well pulley (c) a doorknob (d) a crowbar
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (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 what we measure. (a) False (b) True
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 kept the same. (a) False (b) True
26. 26.True or false: a crane is a lever. (a) False (b) True
27. 27.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
28. 28.🔮 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) both go up (c) the right side (d) neither, it balances
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a flat table (d) a 30 cm ruler
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) a 30 cm ruler (d) coins of one kind
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 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?
32. 32.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit on the middle (d) sit closer to middle
33. 33.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a balloon
35. 35.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
36. 36.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
37. 37.⚙️ Which of these is a lever? (a) a bottle opener (b) a doorknob (c) a crane (d) a slide
38. 38.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
39. 39.True or false: a flat table is needed for the ruler lever. (a) False (b) True
40. 40.True or false: a well pulley uses a pulley. (a) True (b) False

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