Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 880 · 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 of these is needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) a battery cell (d) a balloon
2. 2.⚖️ 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
3. 3.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) bigger on the left (d) equal on both sides
4. 4.⚙️ Which of these is a lever? (a) a see-saw (b) a tap handle (c) a slide (d) a sloping road
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) turmeric powder (d) coins of one kind
6. 6.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
7. 7.⚖️ 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 same ruler (c) which side goes down (d) distance from the pencil
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) impossible (d) harder
9. 9.⚙️ Which of these is a lever? (a) a doorknob (b) a tap handle (c) a bottle opener (d) a well pulley
10. 10.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
11. 11.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
12. 12.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
13. 13.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the right side (c) both go up (d) the left side
14. 14.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is magnetic (d) the spoon is hot
15. 15.⚖️ 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) where the pencil is
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a balloon (d) coins of one kind
17. 17.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) True (b) False
19. 19.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
21. 21.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
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 kind of coins (b) distance from the pencil (c) which side goes down
23. 23.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
24. 24.⚖️ 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 2 cm to the right to balance it?
25. 25.⚖️ 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) which side goes down (c) the number of coins (d) distance from the pencil
26. 26.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a spoon lifting a lid (c) a bottle opener (d) a ramp
27. 27.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a sloping road (c) a ramp (d) a crane
28. 28.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
29. 29.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) a mirror
32. 32.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a spoon lifting a lid (c) a see-saw (d) a flagpole
33. 33.True or false: a steering wheel is a lever. (a) False (b) True
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a flat table (c) a round pencil (d) a 30 cm ruler
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a battery cell (c) a 30 cm ruler (d) coins of one kind
36. 36.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) a magnet
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) a flat table (d) a round pencil
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) a round pencil (d) a mirror

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