Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 563 · 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 simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
2. 2.⚙️ Which of these uses a pulley? (a) a crane (b) a ramp (c) a see-saw (d) a steering wheel
3. 3.⚖️ 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) False (b) True
4. 4.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
5. 5.⚖️ 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 change it (c) we keep it the same
6. 6.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
7. 7.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
8. 8.⚖️ 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
9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
10. 10.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
11. 11.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
12. 12.⚖️ 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) True (b) False
13. 13.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) jump up and down (c) sit farther from middle (d) sit closer to middle
14. 14.⚖️ 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) distance from the pencil (b) the kind of coins (c) where the pencil is (d) the number of coins
15. 15.True or false: a mirror is needed for the ruler lever. (a) True (b) False
16. 16.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
17. 17.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
18. 18.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
19. 19.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) yeast (d) a 30 cm ruler
21. 21.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a magnet (d) a battery cell
22. 22.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
23. 23.True or false: a well pulley is a wheel and axle. (a) False (b) True
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) neither, it balances (c) the right side (d) the left side
26. 26.⚖️ 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
27. 27.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
28. 28.⚖️ 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) False (b) True
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
30. 30.⚖️ 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 number of coins (b) distance from the pencil (c) which side goes down
31. 31.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
32. 32.⚖️ 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
33. 33.True or false: a see-saw is a wheel and axle. (a) False (b) True
34. 34.🧺 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 battery cell (d) a 30 cm ruler
35. 35.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) stand on the ruler (d) press it gently
36. 36.⚙️ Which of these uses a pulley? (a) a slide (b) a sloping road (c) a see-saw (d) a well pulley
37. 37.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
38. 38.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is magnetic (d) the spoon is hot
39. 39.⚖️ 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
40. 40.True or false: a steering wheel is an inclined plane. (a) True (b) False

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