Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 626 · 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.⚖️ 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 keep it the same (b) we measure it (c) we change it
2. 2.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
3. 3.⚖️ 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) False (b) True
4. 4.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are magnetic (d) they are too shiny
5. 5.⚙️ Which of these is a lever? (a) a bottle opener (b) a sloping road (c) a flagpole (d) a crane
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) a round pencil (d) a flat table
7. 7.True or false: a mirror is needed for the ruler lever. (a) False (b) True
8. 8.⚙️ Which of these uses a pulley? (a) a see-saw (b) a slide (c) a flagpole (d) a crowbar
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) turmeric powder (d) a 30 cm ruler
10. 10.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a mirror (c) a magnet (d) a round pencil
11. 11.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
12. 12.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the axle (d) the load
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) a balloon
14. 14.🔮 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) neither, it balances (c) the right side (d) the left side
15. 15.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
16. 16.True or false: a flat table is needed for the ruler lever. (a) True (b) False
17. 17.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
18. 18.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
19. 19.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
20. 20.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
21. 21.True or false: a steering wheel is a wheel and axle. (a) True (b) False
22. 22.🧺 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 round pencil
23. 23.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit on the middle (d) sit closer to middle
24. 24.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
25. 25.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) bigger on the left (d) equal on both sides
26. 26.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
27. 27.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a see-saw (c) a spoon lifting a lid (d) a ramp
28. 28.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) a flat table (d) a mirror
29. 29.⚙️ Which of these is a lever? (a) a doorknob (b) a well pulley (c) a see-saw (d) a flagpole
30. 30.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
31. 31.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
32. 32.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
34. 34.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the lid gets softer (d) the spoon is magnetic
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
37. 37.⚖️ 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) True (b) False
38. 38.⚖️ 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) True (b) False
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) which side goes down (c) the same ruler (d) where the pencil is
40. 40.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) a mirror (d) a 30 cm ruler

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