Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 171 · 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 not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a magnet (d) a flat table
2. 2.🛟 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
3. 3.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
4. 4.⚙️ Which of these uses a pulley? (a) a slide (b) a ramp (c) a spoon lifting a lid (d) a flagpole
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a round pencil (d) a flat table
6. 6.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
7. 7.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a flagpole (c) a doorknob (d) a tap handle
8. 8.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
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) the kind of coins (b) where the pencil is (c) the same ruler (d) which side goes down
10. 10.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a tap handle (c) a crane (d) a bottle opener
11. 11.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) equal on both sides (d) bigger on the left
12. 12.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are too cold (d) they are magnetic
13. 13.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a magnet (d) a round pencil
15. 15.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a doorknob (c) a see-saw (d) a sloping road
16. 16.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a flat table (c) a magnet (d) yeast
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) False (b) True
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a mirror (c) a round pencil (d) coins of one kind
19. 19.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
20. 20.⚖️ 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
21. 21.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
22. 22.⚙️ Which of these uses a pulley? (a) a well pulley (b) a ramp (c) a steering wheel (d) a see-saw
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 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?
24. 24.⚙️ Which of these is a lever? (a) a doorknob (b) a crowbar (c) a flagpole (d) a slide
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a 30 cm ruler (c) coins of one kind (d) a flat table
26. 26.True or false: yeast is needed for the ruler lever. (a) True (b) False
27. 27.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
28. 28.⚖️ 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) distance from the pencil (b) the kind of coins (c) the same ruler (d) where the pencil is
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) True (b) False
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) False (b) True
31. 31.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) yeast
33. 33.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
34. 34.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
35. 35.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
36. 36.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) sit closer to middle (d) jump up and down
37. 37.⚖️ 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) True (b) False
38. 38.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a 30 cm ruler (c) a magnet (d) yeast
39. 39.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 3 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?

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