Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 549 · 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) a round pencil (b) a flat table (c) a balloon (d) a 30 cm ruler
2. 2.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
3. 3.⚙️ Which of these is an inclined plane? (a) a slide (b) a well pulley (c) a see-saw (d) a crowbar
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
5. 5.⚙️ Which of these is a lever? (a) a doorknob (b) a see-saw (c) a tap handle (d) a crane
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 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?
7. 7.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
8. 8.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) flick coins at faces (d) press it gently
9. 9.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
10. 10.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) yeast (c) a round pencil (d) a magnet
11. 11.⚖️ 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 change it (b) we measure it (c) we keep it the same
12. 12.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a bottle opener (c) a crowbar (d) a ramp
13. 13.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
14. 14.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
15. 15.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
16. 16.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
17. 17.True or false: a see-saw is a lever. (a) False (b) True
18. 18.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
19. 19.True or false: a crane uses a pulley. (a) True (b) False
20. 20.⚙️ Which of these uses a pulley? (a) a ramp (b) a doorknob (c) a slide (d) a well pulley
21. 21.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
22. 22.⚖️ 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) which side goes down (b) distance from the pencil (c) the number of coins (d) the kind of coins
23. 23.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
24. 24.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
25. 25.True or false: a see-saw uses a pulley. (a) False (b) True
26. 26.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a mirror (c) a flat table (d) coins of one kind
28. 28.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a well pulley (c) a bottle opener (d) a see-saw
29. 29.⚖️ 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
30. 30.🔮 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 left side (c) both go up (d) the right side
31. 31.True or false: a see-saw is an inclined plane. (a) False (b) True
32. 32.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
33. 33.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
34. 34.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) yeast (c) a round pencil (d) a 30 cm ruler
35. 35.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they are magnetic (d) they may swallow them
36. 36.⚖️ 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
37. 37.⚖️ 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
38. 38.⚙️ Which of these is a lever? (a) a steering wheel (b) a tap handle (c) a bottle opener (d) a flagpole
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) the kind of coins (c) the same ruler (d) which side goes down
40. 40.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a battery cell (d) a flat table

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