Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 874 · 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 an inclined plane? (a) a doorknob (b) a see-saw (c) a sloping road (d) a spoon lifting a lid
2. 2.True or false: a slide is a lever. (a) False (b) True
3. 3.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
4. 4.⚖️ 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 number of coins (c) which side goes down (d) the kind of coins
5. 5.⚖️ 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 same ruler (b) distance from the pencil (c) which side goes down (d) where the pencil is
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) impossible (d) easier
7. 7.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a 30 cm ruler (d) a balloon
8. 8.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they are too cold (d) they may swallow them
9. 9.True or false: a mirror is needed for the ruler lever. (a) False (b) True
10. 10.⚖️ 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) True (b) False
11. 11.True or false: a tap handle is an inclined plane. (a) True (b) False
12. 12.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
13. 13.🧺 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 round pencil (d) a magnet
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
15. 15.🔮 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) the left side (c) the right side (d) neither, it balances
16. 16.⚖️ 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
17. 17.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
18. 18.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) the number of coins (c) distance from the pencil
21. 21.⚖️ 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
22. 22.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
23. 23.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a flat table (c) a mirror (d) a magnet
24. 24.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
25. 25.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
26. 26.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit farther from middle (d) sit closer to middle
27. 27.True or false: a crane uses a pulley. (a) True (b) False
28. 28.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
29. 29.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
30. 30.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
31. 31.⚙️ Which of these is a lever? (a) a sloping road (b) a see-saw (c) a flagpole (d) a steering wheel
32. 32.⚖️ 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
33. 33.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 1 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) coins of one kind (c) a 30 cm ruler (d) a flat table
36. 36.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
37. 37.🧺 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 mirror
38. 38.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
39. 39.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a magnet (d) coins of one kind
40. 40.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a bottle opener (c) a well pulley (d) a ramp

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