Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 56 · 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.🔮 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) the left side (d) both go up
2. 2.⚖️ 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
3. 3.⚖️ 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 farther from middle (d) sit on the middle
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) a 30 cm ruler (d) a round pencil
5. 5.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
6. 6.True or false: a well pulley is a wheel and axle. (a) False (b) True
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
8. 8.True or false: a well pulley uses a pulley. (a) True (b) False
9. 9.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
10. 10.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
11. 11.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they are too cold (d) they may swallow them
12. 12.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a spoon lifting a lid (d) a sloping road
13. 13.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
14. 14.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) turmeric powder (d) coins of one kind
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
17. 17.⚖️ 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
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
19. 19.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) the spoon is hot (d) a lever boosts your push
20. 20.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
21. 21.True or false: a crowbar is a lever. (a) True (b) False
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) False (b) True
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) yeast (d) a flat table
24. 24.⚙️ Which of these is a wheel and axle? (a) a slide (b) a crane (c) a steering wheel (d) a ramp
25. 25.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
26. 26.🧺 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 flat table (d) a mirror
27. 27.⚖️ 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) the kind of coins
28. 28.⚖️ 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) False (b) True
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a battery cell (d) a 30 cm ruler
30. 30.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a doorknob (c) a sloping road (d) a well pulley
31. 31.⚙️ Which of these is a lever? (a) a slide (b) a crane (c) a well pulley (d) a crowbar
32. 32.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a round pencil (c) a flat table (d) a 30 cm ruler
34. 34.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
35. 35.⚖️ 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
36. 36.⚖️ 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 measure it (c) we keep it the same
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) True (b) False
38. 38.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a mirror (c) a battery cell (d) turmeric powder
39. 39.⚙️ Which of these is a lever? (a) a sloping road (b) a steering wheel (c) a bottle opener (d) a flagpole
40. 40.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley

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