Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 500 · 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.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
2. 2.⚖️ 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
3. 3.True or false: a magnet is needed for the ruler lever. (a) True (b) False
4. 4.⚖️ 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 measure it (b) we keep it the same (c) we change it
5. 5.⚖️ 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 same ruler
6. 6.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) coins of one kind (d) a battery cell
7. 7.⚙️ Which of these is a lever? (a) a steering wheel (b) a well pulley (c) a slide (d) a spoon lifting a lid
8. 8.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a balloon
9. 9.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) turmeric powder (d) a battery cell
10. 10.🛟 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
11. 11.True or false: yeast is needed for the ruler lever. (a) True (b) False
12. 12.⚖️ 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) a lever boosts your push (d) the spoon is hot
13. 13.⚙️ Which simple machine is a sloping road? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
14. 14.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a sloping road (c) a flagpole (d) a see-saw
15. 15.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) zero (d) equal on both sides
16. 16.⚖️ 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 change it (b) we measure it (c) we keep it the same
17. 17.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
18. 18.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
19. 19.True or false: a slide is an inclined plane. (a) False (b) True
20. 20.⚖️ 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) True (b) False
21. 21.⚖️ 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 number of coins (c) distance from the pencil
22. 22.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the same ruler (b) where the pencil is (c) the kind of coins (d) which side goes down
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
25. 25.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
26. 26.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
27. 27.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
28. 28.True or false: a ramp is a wheel and axle. (a) False (b) True
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) a mirror
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 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?
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 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?
32. 32.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
33. 33.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a bottle opener (c) a ramp (d) a tap handle
34. 34.⚙️ Which of these is a lever? (a) a flagpole (b) a slide (c) a sloping road (d) a crowbar
35. 35.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
36. 36.⚙️ Which of these is a wheel and axle? (a) a crane (b) a see-saw (c) a slide (d) a tap handle
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
38. 38.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
39. 39.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
40. 40.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a spoon lifting a lid (c) a flagpole (d) a see-saw

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