Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 435 · 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 is a lever? (a) a doorknob (b) a sloping road (c) a crowbar (d) a tap handle
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
3. 3.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
4. 4.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a spoon lifting a lid (d) a well pulley
5. 5.⚙️ Which of these is a lever? (a) a sloping road (b) a well pulley (c) a tap handle (d) a see-saw
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.True or false: yeast is not needed for the ruler lever. (a) False (b) True
8. 8.🔮 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
9. 9.⚖️ 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 number of coins (c) where the pencil is (d) the same ruler
10. 10.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) flick coins at faces (d) bend it till it snaps
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a flat table (d) a balloon
13. 13.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is magnetic (c) the lid gets softer (d) the spoon is hot
14. 14.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
15. 15.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
16. 16.⚖️ 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?
17. 17.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
18. 18.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 3 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
20. 20.⚙️ Which of these uses a pulley? (a) a slide (b) a steering wheel (c) a see-saw (d) a crane
21. 21.⚖️ 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
22. 22.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
23. 23.True or false: a doorknob is a lever. (a) True (b) False
24. 24.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
25. 25.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
26. 26.⚙️ Which of these is a lever? (a) a slide (b) a sloping road (c) a spoon lifting a lid (d) a ramp
27. 27.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a 30 cm ruler (c) yeast (d) a battery cell
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) a flat table (d) a round pencil
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
30. 30.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
31. 31.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are magnetic (d) they are too cold
32. 32.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crowbar (c) a crane (d) a spoon lifting a lid
33. 33.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
34. 34.⚖️ 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
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.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
37. 37.True or false: a see-saw is a wheel and axle. (a) False (b) True
38. 38.⚖️ 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) the number of coins (c) the same ruler (d) distance from the pencil
39. 39.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a see-saw (c) a well pulley (d) a doorknob
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) False (b) True

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