Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 517 · 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 a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) flick coins at faces (d) stand on the ruler
2. 2.⚖️ 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 number of coins
3. 3.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
4. 4.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) turmeric powder (d) a round pencil
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
7. 7.⚖️ 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 measure it (b) we change it (c) we keep it the same
8. 8.True or false: a sloping road is a wheel and axle. (a) True (b) False
9. 9.True or false: a doorknob is a wheel and axle. (a) True (b) False
10. 10.True or false: a well pulley is a lever. (a) False (b) True
11. 11.⚙️ Which of these uses a pulley? (a) a sloping road (b) a tap handle (c) a ramp (d) a crane
12. 12.🧺 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 round pencil (d) a magnet
13. 13.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
14. 14.True or false: a magnet is needed for the ruler lever. (a) True (b) False
15. 15.⚖️ 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 2 cm to the right to balance it?
16. 16.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
17. 17.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) turmeric powder
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a balloon (c) coins of one kind (d) a round pencil
19. 19.⚙️ Which of these is a lever? (a) a flagpole (b) a crowbar (c) a well pulley (d) a tap handle
20. 20.⚖️ 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
21. 21.⚖️ 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 keep it the same (c) we change it
22. 22.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
23. 23.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) sit farther from middle (d) jump up and down
24. 24.⚖️ 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
25. 25.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a sloping road (c) a flagpole (d) a crowbar
26. 26.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
27. 27.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a ramp (c) a well pulley (d) a steering wheel
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) yeast (d) a 30 cm ruler
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
30. 30.True or false: a ramp is an inclined plane. (a) True (b) False
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a mirror (d) a 30 cm ruler
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False
33. 33.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) impossible (d) the same
34. 34.⚖️ 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
35. 35.⚖️ 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
36. 36.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
37. 37.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a tap handle (c) a slide (d) a ramp
38. 38.True or false: a bottle opener uses a pulley. (a) False (b) True
39. 39.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a balloon (c) a battery cell (d) coins of one kind
40. 40.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed

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