Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 277 · 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 uses a pulley? (a) a crowbar (b) a steering wheel (c) a bottle opener (d) a well pulley
2. 2.⚖️ 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) where the pencil is (c) the number of coins (d) distance from the pencil
3. 3.⚖️ 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
4. 4.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) a mirror (d) a magnet
5. 5.True or false: a balloon is needed for the ruler lever. (a) True (b) False
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
7. 7.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a ramp (c) a tap handle (d) a see-saw
8. 8.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
9. 9.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
10. 10.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
11. 11.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
12. 12.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
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) the left side (b) the right side (c) neither, it balances (d) both go up
14. 14.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
15. 15.🧺 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 round pencil (d) turmeric powder
16. 16.⚙️ Which of these is an inclined plane? (a) a crane (b) a slide (c) a crowbar (d) a well pulley
17. 17.True or false: a see-saw is a lever. (a) True (b) False
18. 18.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
19. 19.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit on the middle (d) sit closer to middle
20. 20.True or false: a crane uses a pulley. (a) False (b) True
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) False (b) True
22. 22.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
23. 23.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
24. 24.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a mirror (d) a round pencil
25. 25.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
26. 26.True or false: a steering wheel uses a pulley. (a) True (b) False
27. 27.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) a balloon (d) coins of one kind
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 3 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
29. 29.True or false: a sloping road is a lever. (a) True (b) False
30. 30.⚖️ 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?
31. 31.⚖️ 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) distance from the pencil (c) the same ruler
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.🧺 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 round pencil (d) a mirror
34. 34.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
36. 36.⚙️ Which of these uses a pulley? (a) a tap handle (b) a ramp (c) a crane (d) a slide
37. 37.True or false: a bottle opener is a wheel and axle. (a) True (b) False
38. 38.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
39. 39.🛟 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
40. 40.True or false: a well pulley uses a pulley. (a) False (b) True

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