Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 760 · 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 simple machine is a bottle opener? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 5 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
3. 3.🛟 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
4. 4.True or false: a tap handle is a lever. (a) False (b) True
5. 5.🔮 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 right side (b) the left side (c) both go up (d) neither, it balances
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) yeast (c) coins of one kind (d) a round pencil
7. 7.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit farther from middle (d) sit on the middle
8. 8.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
9. 9.True or false: a flagpole is an inclined plane. (a) False (b) True
10. 10.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
11. 11.⚖️ 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
12. 12.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) zero (d) always 10
13. 13.⚖️ 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
14. 14.⚖️ 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 same ruler (c) which side goes down
15. 15.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a crane (c) a tap handle (d) a sloping road
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
17. 17.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
18. 18.⚖️ 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) which side goes down (b) the number of coins (c) the same ruler (d) distance from the pencil
19. 19.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) harder (d) easier
20. 20.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a round pencil (d) a battery cell
21. 21.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
22. 22.⚖️ 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 number of coins (b) distance from the pencil (c) the same ruler (d) which side goes down
23. 23.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
24. 24.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
25. 25.⚖️ 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
26. 26.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is magnetic (d) the spoon is hot
27. 27.⚙️ Which of these uses a pulley? (a) a see-saw (b) a flagpole (c) a doorknob (d) a sloping road
28. 28.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
29. 29.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) stand on the ruler (d) press it gently
30. 30.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
31. 31.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
32. 32.⚙️ Which of these is a wheel and axle? (a) a slide (b) a spoon lifting a lid (c) a ramp (d) a doorknob
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 battery cell (d) a round pencil
34. 34.True or false: a magnet is needed for the ruler lever. (a) False (b) True
35. 35.True or false: a doorknob is a lever. (a) True (b) False
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
37. 37.True or false: a see-saw is a lever. (a) False (b) True
38. 38.⚖️ 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 measure it (b) we keep it the same (c) we change it
39. 39.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
40. 40.⚙️ Which of these is a lever? (a) a sloping road (b) a see-saw (c) a ramp (d) a steering wheel

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