Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 306 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) yeast (d) a 30 cm ruler
2. 2.⚖️ 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) which side goes down (c) where the pencil is (d) distance from the pencil
3. 3.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a ramp (c) a slide (d) a sloping road
4. 4.⚖️ 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 measure it (c) we change it
5. 5.True or false: a magnet is needed for the ruler lever. (a) False (b) True
6. 6.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
7. 7.True or false: a ramp is an inclined plane. (a) False (b) True
8. 8.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a mirror (c) coins of one kind (d) a 30 cm ruler
9. 9.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
10. 10.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are too cold (d) they are magnetic
11. 11.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
12. 12.⚖️ 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
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a balloon
14. 14.True or false: a see-saw is a lever. (a) True (b) False
15. 15.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
16. 16.True or false: a crane is a wheel and axle. (a) False (b) True
17. 17.⚙️ Which of these is an inclined plane? (a) a crane (b) a spoon lifting a lid (c) a sloping road (d) a bottle opener
18. 18.⚖️ 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 measure it (b) we change it (c) we keep it the same
19. 19.⚙️ Which of these uses a pulley? (a) a see-saw (b) a spoon lifting a lid (c) a well pulley (d) a tap handle
20. 20.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
21. 21.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a slide (c) a flagpole (d) a doorknob
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
23. 23.⚖️ 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) where the pencil is (c) which side goes down
24. 24.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a balloon (c) yeast (d) a magnet
25. 25.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
26. 26.⚙️ Which of these is a lever? (a) a ramp (b) a crowbar (c) a tap handle (d) a doorknob
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 10 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
28. 28.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
29. 29.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.⚖️ 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) where the pencil is (c) the kind of coins (d) the same ruler
32. 32.⚖️ 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 change it (b) we keep it the same (c) we measure it
33. 33.⚙️ Which of these is an inclined plane? (a) a ramp (b) a doorknob (c) a well pulley (d) a crane
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a flat table (d) turmeric powder
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) yeast (d) a 30 cm ruler
36. 36.⚖️ 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) distance from the pencil (c) the number of coins
37. 37.⚙️ Which of these uses a pulley? (a) a doorknob (b) a ramp (c) a see-saw (d) a flagpole
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
39. 39.🧺 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 flat table (d) turmeric powder
40. 40.True or false: a sloping road is a wheel and axle. (a) True (b) False

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