Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 804 · 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 steering wheel is a wheel and axle. (a) False (b) True
2. 2.True or false: a flat table is needed for the ruler lever. (a) False (b) True
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 10 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?
4. 4.True or false: a ramp is a lever. (a) True (b) False
5. 5.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) press it gently (d) stand on the ruler
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a round pencil (d) a battery cell
7. 7.⚙️ Which of these is a lever? (a) a ramp (b) a well pulley (c) a bottle opener (d) a crane
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the kind of coins
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a mirror (d) a 30 cm ruler
10. 10.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a doorknob (c) a well pulley (d) a spoon lifting a lid
11. 11.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a magnet (d) coins of one kind
12. 12.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 5 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
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) the left side (b) both go up (c) neither, it balances (d) the right side
16. 16.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) yeast (c) a 30 cm ruler (d) a flat table
17. 17.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
18. 18.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) impossible (d) harder
19. 19.⚙️ Which of these uses a pulley? (a) a see-saw (b) a bottle opener (c) a ramp (d) a flagpole
20. 20.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they are too cold (d) they may swallow them
21. 21.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a tap handle (c) a crane (d) a well pulley
22. 22.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
23. 23.⚖️ 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 number of coins (c) the same ruler (d) which side goes down
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
25. 25.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) a lever boosts your push (d) the spoon is magnetic
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 keep it the same (c) we measure it
27. 27.⚙️ Which of these uses a pulley? (a) a crane (b) a crowbar (c) a slide (d) a doorknob
28. 28.⚖️ 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 keep it the same (c) we measure it
29. 29.True or false: a slide is an inclined plane. (a) True (b) False
30. 30.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 8 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
32. 32.⚖️ 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) distance from the pencil (c) the number of coins
33. 33.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
34. 34.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) coins of one kind (d) a balloon
35. 35.⚖️ 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 kind of coins (b) distance from the pencil (c) where the pencil is (d) the same ruler
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a magnet (c) coins of one kind (d) a 30 cm ruler
37. 37.⚖️ 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
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 10 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
39. 39.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a magnet (c) a battery cell (d) a mirror
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 3 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?

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