Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 221 · 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.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
2. 2.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a 30 cm ruler (d) a flat table
4. 4.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
5. 5.⚖️ 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 number of coins (b) distance from the pencil (c) the same ruler (d) where the pencil is
6. 6.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a flagpole (c) a spoon lifting a lid (d) a crane
7. 7.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
8. 8.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
9. 9.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a flat table (c) a 30 cm ruler (d) a round pencil
10. 10.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
11. 11.⚖️ 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
12. 12.⚖️ 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
13. 13.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a flagpole (c) a see-saw (d) a slide
14. 14.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) jump up and down (d) sit on the middle
15. 15.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) a magnet
16. 16.True or false: a see-saw is a lever. (a) False (b) True
17. 17.True or false: a crowbar uses a pulley. (a) False (b) True
18. 18.⚖️ 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) the same ruler (c) distance from the pencil
19. 19.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they may swallow them (d) they are magnetic
20. 20.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
21. 21.⚙️ Which of these is a lever? (a) a sloping road (b) a slide (c) a see-saw (d) a crane
22. 22.True or false: a steering wheel is a wheel and axle. (a) True (b) False
23. 23.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
24. 24.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) zero (d) bigger on the left
25. 25.🛟 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
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 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?
27. 27.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a see-saw (d) a doorknob
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a battery cell
29. 29.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the right side (c) the left side (d) neither, it balances
30. 30.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a battery cell (c) a round pencil (d) a flat table
31. 31.⚙️ Which of these is a lever? (a) a ramp (b) a flagpole (c) a crowbar (d) a crane
32. 32.⚖️ 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 keep it the same (b) we change it (c) we measure it
33. 33.⚖️ 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 keep it the same (b) we measure it (c) we change it
34. 34.⚖️ 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) the same ruler (d) where the pencil is
35. 35.⚖️ 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
36. 36.True or false: a crowbar is a lever. (a) True (b) False
37. 37.⚖️ 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
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) yeast (d) a 30 cm ruler
39. 39.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
40. 40.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a crowbar (c) a see-saw (d) a slide

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