Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 356 · 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 tap handle uses a pulley. (a) False (b) True
2. 2.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) yeast (d) a mirror
3. 3.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
4. 4.⚖️ 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 keep it the same (b) we change it (c) we measure it
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 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?
6. 6.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
7. 7.⚖️ 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?
8. 8.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
9. 9.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
10. 10.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) the spoon is magnetic (d) a lever boosts your push
11. 11.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a tap handle (c) a doorknob (d) a slide
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the kind of coins (c) the same ruler (d) where the pencil is
13. 13.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
14. 14.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
15. 15.True or false: a steering wheel is a wheel and axle. (a) True (b) False
16. 16.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
17. 17.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are magnetic (d) they are too cold
18. 18.True or false: a ramp is an inclined plane. (a) True (b) False
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a balloon (d) a round pencil
20. 20.⚖️ 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) the number of coins (c) which side goes down
21. 21.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
22. 22.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
23. 23.🔮 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 left side (c) the right side (d) neither, it balances
24. 24.True or false: a crane is a lever. (a) True (b) False
25. 25.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a spoon lifting a lid (c) a steering wheel (d) a ramp
26. 26.⚖️ 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) True (b) False
27. 27.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
28. 28.🧺 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) turmeric powder
29. 29.True or false: a magnet is needed for the ruler lever. (a) False (b) True
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False
31. 31.⚖️ 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 same ruler (c) distance from the pencil (d) the kind of coins
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) a flat table (d) a round pencil
33. 33.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a magnet (d) a flat table
35. 35.⚖️ 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 on the middle (d) sit farther from middle
36. 36.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crane (c) a steering wheel (d) a see-saw
37. 37.True or false: a see-saw uses a pulley. (a) True (b) False
38. 38.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
39. 39.⚖️ 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
40. 40.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the effort (d) the axle

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