Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 590 · 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.⚖️ 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) which side goes down (b) distance from the pencil (c) the same ruler (d) the number of coins
2. 2.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit farther from middle (d) sit on the middle
3. 3.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
5. 5.⚖️ 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 measure it (b) we change it (c) we keep it the same
6. 6.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a ramp (c) a spoon lifting a lid (d) a see-saw
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
8. 8.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) a battery cell (d) a 30 cm ruler
9. 9.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
10. 10.🔮 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 right side (c) the left side (d) neither, it balances
11. 11.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) bigger on the left (c) equal on both sides (d) always 10
12. 12.⚖️ 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
13. 13.⚖️ 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?
14. 14.⚙️ Which of these uses a pulley? (a) a sloping road (b) a crane (c) a crowbar (d) a spoon lifting a lid
15. 15.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a tap handle (c) a slide (d) a well pulley
16. 16.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
17. 17.🧺 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 battery cell (d) a flat table
18. 18.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a magnet (c) a round pencil (d) a 30 cm ruler
20. 20.⚙️ Which of these is a lever? (a) a tap handle (b) a flagpole (c) a well pulley (d) a see-saw
21. 21.True or false: a slide is an inclined plane. (a) False (b) True
22. 22.True or false: a flat table is needed for the ruler lever. (a) True (b) False
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) turmeric powder (d) a 30 cm ruler
24. 24.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
25. 25.⚖️ 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 keep it the same (b) we measure it (c) we change it
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a mirror (c) a round pencil (d) coins of one kind
27. 27.⚖️ 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?
28. 28.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
29. 29.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
30. 30.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a slide (c) a steering wheel (d) a sloping road
31. 31.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) a balloon (d) coins of one kind
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
33. 33.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crowbar (c) a see-saw (d) a flagpole
34. 34.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a round pencil (d) a battery cell
35. 35.True or false: a doorknob is a wheel and axle. (a) True (b) False
36. 36.True or false: a doorknob is an inclined plane. (a) False (b) True
37. 37.⚙️ Which of these is a wheel and axle? (a) a slide (b) a see-saw (c) a sloping road (d) a tap handle
38. 38.⚖️ 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?
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
40. 40.True or false: a doorknob is a lever. (a) True (b) False

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