Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 50 · 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: a mirror is not needed for the ruler lever. (a) True (b) False
2. 2.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
3. 3.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
4. 4.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) jump up and down (d) sit on the middle
5. 5.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) coins of one kind (d) a battery cell
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) turmeric powder (c) coins of one kind (d) a flat table
7. 7.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
8. 8.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
9. 9.⚖️ 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) False (b) True
10. 10.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
11. 11.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a see-saw (c) a flagpole (d) a crowbar
12. 12.True or false: a mirror is needed for the ruler lever. (a) True (b) False
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.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a steering wheel (c) a flagpole (d) a well pulley
15. 15.🧺 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
16. 16.⚙️ Which of these is a wheel and axle? (a) a crane (b) a bottle opener (c) a doorknob (d) a slide
17. 17.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
18. 18.⚖️ 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 keep it the same (b) we measure it (c) we change it
19. 19.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
20. 20.⚖️ 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
21. 21.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) zero (d) always 10
22. 22.True or false: a see-saw is a lever. (a) True (b) False
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a balloon (c) a round pencil (d) coins of one kind
24. 24.True or false: a well pulley is a lever. (a) True (b) False
25. 25.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) press it gently (d) flick coins at faces
26. 26.⚙️ Which of these is a lever? (a) a doorknob (b) a flagpole (c) a bottle opener (d) a steering wheel
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
28. 28.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a crowbar (c) a ramp (d) a tap handle
29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
30. 30.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are magnetic (d) they are too cold
31. 31.⚖️ 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) True (b) False
32. 32.True or false: a ramp is a wheel and axle. (a) False (b) True
33. 33.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
34. 34.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.⚖️ 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
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
39. 39.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) yeast (d) a 30 cm ruler
40. 40.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed

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