Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 768 · 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 simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
2. 2.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a balloon (c) a 30 cm ruler (d) coins of one kind
3. 3.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
4. 4.True or false: a crane uses a pulley. (a) False (b) True
5. 5.True or false: yeast is needed for the ruler lever. (a) False (b) True
6. 6.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
7. 7.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
8. 8.🔮 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) neither, it balances (c) the right side (d) both go up
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 what we measure. (a) False (b) True
10. 10.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
12. 12.⚙️ Which of these is a lever? (a) a well pulley (b) a see-saw (c) a tap handle (d) a sloping road
13. 13.⚖️ 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) the same ruler (d) which side goes down
14. 14.⚖️ 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) where the pencil is (b) distance from the pencil (c) which side goes down (d) the same ruler
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
16. 16.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
17. 17.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too shiny (d) they are too cold
18. 18.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
19. 19.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
20. 20.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
21. 21.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
22. 22.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a well pulley (c) a crowbar (d) a slide
23. 23.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
24. 24.True or false: a spoon lifting a lid is a lever. (a) False (b) True
25. 25.⚙️ Which of these uses a pulley? (a) a see-saw (b) a doorknob (c) a crane (d) a steering wheel
26. 26.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) a mirror (d) yeast
27. 27.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a magnet (d) a flat table
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
29. 29.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
30. 30.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) the spoon is hot (d) a lever boosts your push
31. 31.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) harder (d) impossible
32. 32.True or false: a slide is a lever. (a) False (b) True
33. 33.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
34. 34.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) yeast (c) a balloon (d) a 30 cm ruler
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
37. 37.True or false: a crowbar is a lever. (a) False (b) True
38. 38.⚙️ Which of these uses a pulley? (a) a doorknob (b) a crowbar (c) a bottle opener (d) a flagpole
39. 39.True or false: a bottle opener is an inclined plane. (a) True (b) False
40. 40.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) yeast (c) a magnet (d) a balloon

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