Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 69 · 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 30 cm ruler (b) coins of one kind (c) a round pencil (d) a battery cell
2. 2.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
3. 3.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) a 30 cm ruler (d) a flat table
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) coins of one kind (d) a 30 cm ruler
5. 5.🔮 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 right side (b) neither, it balances (c) the left side (d) both go up
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
7. 7.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are magnetic (d) they are too shiny
8. 8.⚖️ 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) the same ruler (d) where the pencil is
9. 9.⚙️ Which of these is a lever? (a) a ramp (b) a bottle opener (c) a sloping road (d) a doorknob
10. 10.True or false: a mirror is needed for the ruler lever. (a) True (b) False
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a magnet (d) a flat table
13. 13.⚙️ Which of these uses a pulley? (a) a sloping road (b) a steering wheel (c) a flagpole (d) a spoon lifting a lid
14. 14.⚙️ Which of these uses a pulley? (a) a sloping road (b) a doorknob (c) a crane (d) a see-saw
15. 15.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a balloon (c) turmeric powder (d) a mirror
16. 16.⚖️ 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
17. 17.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a tap handle (c) a well pulley (d) a ramp
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 measure it (b) we keep it the same (c) we change it
19. 19.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) bend it till it snaps (d) press it gently
20. 20.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a see-saw (c) a slide (d) a spoon lifting a lid
21. 21.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
22. 22.True or false: a tap handle is a lever. (a) False (b) True
23. 23.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
24. 24.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
25. 25.⚖️ 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 kind of coins (b) distance from the pencil (c) which side goes down
26. 26.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
27. 27.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
28. 28.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
29. 29.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
30. 30.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
31. 31.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the spoon is hot (d) the lid gets softer
32. 32.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) turmeric powder (d) a 30 cm ruler
33. 33.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
34. 34.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
35. 35.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
36. 36.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
37. 37.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False
39. 39.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
40. 40.True or false: a doorknob is a lever. (a) True (b) False

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