Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 919 · 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? What do we do with “the number of coins”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.⚙️ Which of these is a lever? (a) a slide (b) a spoon lifting a lid (c) a steering wheel (d) a tap handle
3. 3.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) equal on both sides (c) always 10 (d) bigger on the left
4. 4.🔮 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) neither, it balances (c) the right side (d) the left side
5. 5.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
6. 6.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
7. 7.⚙️ Which of these is a lever? (a) a slide (b) a sloping road (c) a see-saw (d) a tap handle
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) True (b) False
9. 9.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
10. 10.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) a round pencil (d) a flat table
11. 11.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down
12. 12.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a ramp (c) a crowbar (d) a steering wheel
13. 13.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 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?
15. 15.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a flat table (d) a battery cell
16. 16.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a magnet
18. 18.⚙️ Which of these uses a pulley? (a) a well pulley (b) a steering wheel (c) a tap handle (d) a crowbar
19. 19.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the spoon is magnetic (c) the lid gets softer (d) a lever boosts your push
20. 20.⚖️ 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) the number of coins (c) the kind of coins (d) distance from the pencil
21. 21.True or false: a steering wheel is an inclined plane. (a) True (b) False
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a battery cell (d) coins of one kind
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) yeast (d) a 30 cm ruler
25. 25.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
26. 26.True or false: a steering wheel uses a pulley. (a) True (b) False
27. 27.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
28. 28.⚙️ Which of these is a lever? (a) a doorknob (b) a sloping road (c) a flagpole (d) a crowbar
29. 29.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a mirror (c) a 30 cm ruler (d) a round pencil
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) the kind of coins (c) distance from the pencil
33. 33.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
34. 34.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
35. 35.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
36. 36.True or false: a tap handle is a lever. (a) False (b) True
37. 37.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
38. 38.⚙️ Which of these uses a pulley? (a) a doorknob (b) a flagpole (c) a tap handle (d) a slide
39. 39.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
40. 40.True or false: a spoon lifting a lid is a lever. (a) True (b) False

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