Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 631 · 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 ramp is an inclined plane. (a) True (b) False
2. 2.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
3. 3.⚖️ 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) the kind of coins (c) distance from the pencil (d) which side goes down
4. 4.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a round pencil (d) a mirror
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
6. 6.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a flat table (c) turmeric powder (d) a magnet
7. 7.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
9. 9.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
10. 10.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
11. 11.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) sit closer to middle (d) jump up and down
12. 12.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a tap handle (c) a bottle opener (d) a slide
13. 13.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a mirror (d) a 30 cm ruler
14. 14.True or false: a steering wheel uses a pulley. (a) True (b) False
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 10 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the same ruler (b) which side goes down (c) the kind of coins (d) where the pencil is
17. 17.⚙️ Which of these uses a pulley? (a) a well pulley (b) a bottle opener (c) a doorknob (d) a see-saw
18. 18.True or false: a spoon lifting a lid is a lever. (a) False (b) True
19. 19.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
20. 20.⚙️ Which of these is a lever? (a) a tap handle (b) a sloping road (c) a spoon lifting a lid (d) a doorknob
21. 21.🧺 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 30 cm ruler (d) a magnet
22. 22.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil
23. 23.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
24. 24.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
26. 26.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) a magnet
29. 29.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
30. 30.⚖️ 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
31. 31.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
32. 32.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
33. 33.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a steering wheel (c) a ramp (d) a tap handle
34. 34.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) press it gently (d) stand on the ruler
35. 35.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a 30 cm ruler (c) turmeric powder (d) a mirror
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True
37. 37.⚙️ Which of these uses a pulley? (a) a flagpole (b) a ramp (c) a sloping road (d) a tap handle
38. 38.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a battery cell (d) a round pencil
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) yeast (d) a flat table
40. 40.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False

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