Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 475 · 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 the turning point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
2. 2.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
3. 3.True or false: a well pulley is a lever. (a) True (b) False
4. 4.⚙️ Which of these uses a pulley? (a) a crowbar (b) a spoon lifting a lid (c) a ramp (d) a well pulley
5. 5.⚙️ Which of these is a lever? (a) a crane (b) a slide (c) a spoon lifting a lid (d) a ramp
6. 6.🔮 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 left side (c) neither, it balances (d) the right side
7. 7.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) harder (d) the same
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 number of coins (b) which side goes down (c) where the pencil is (d) the same ruler
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) yeast (d) coins of one kind
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
12. 12.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
13. 13.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
14. 14.⚖️ 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
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) False (b) True
16. 16.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
17. 17.⚖️ 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) which side goes down (b) where the pencil is (c) distance from the pencil (d) the kind of coins
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) turmeric powder
19. 19.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) zero (d) equal on both sides
20. 20.True or false: a mirror is needed for the ruler lever. (a) False (b) True
21. 21.⚖️ 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 keep it the same (c) we measure it
22. 22.True or false: a tap handle is a wheel and axle. (a) False (b) True
23. 23.⚙️ Which of these is a lever? (a) a slide (b) a see-saw (c) a well pulley (d) a crane
24. 24.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a magnet
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a balloon (c) a magnet (d) a mirror
28. 28.⚖️ 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
29. 29.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
30. 30.⚙️ Which of these is an inclined plane? (a) a crane (b) a ramp (c) a spoon lifting a lid (d) a flagpole
31. 31.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is hot (d) the spoon is magnetic
32. 32.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
33. 33.⚖️ 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 kind of coins
34. 34.🛟 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
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.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 3 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) a battery cell
38. 38.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
39. 39.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
40. 40.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False

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