Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 752 · 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.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crowbar (c) a ramp (d) a well pulley
2. 2.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
3. 3.⚙️ Which of these is a lever? (a) a crowbar (b) a crane (c) a flagpole (d) a tap handle
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) coins of one kind (d) a round pencil
5. 5.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
6. 6.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
7. 7.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a balloon (d) coins of one kind
8. 8.⚙️ Which of these is an inclined plane? (a) a ramp (b) a bottle opener (c) a flagpole (d) a well pulley
9. 9.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a see-saw (c) a crowbar (d) a sloping road
10. 10.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
11. 11.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
12. 12.⚙️ Which of these uses a pulley? (a) a flagpole (b) a steering wheel (c) a crowbar (d) a ramp
13. 13.⚖️ 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 kind of coins (b) distance from the pencil (c) the number of coins (d) which side goes down
14. 14.True or false: a bottle opener is an inclined plane. (a) False (b) True
15. 15.⚖️ 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 keep it the same (c) we measure it
16. 16.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) True (b) False
18. 18.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
19. 19.⚙️ Which of these uses a pulley? (a) a crane (b) a ramp (c) a crowbar (d) a bottle opener
20. 20.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
21. 21.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a steering wheel (c) a doorknob (d) a slide
22. 22.⚖️ 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 keep it the same (b) we measure it (c) we change it
23. 23.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a mirror (d) a round pencil
25. 25.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
26. 26.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 3 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
28. 28.⚖️ 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
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a flat table (c) a round pencil (d) coins of one kind
30. 30.⚖️ 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) False (b) True
31. 31.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) a lever boosts your push (d) the spoon is magnetic
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a flat table (c) a 30 cm ruler (d) a round pencil
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 8 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.⚙️ Which of these is a lever? (a) a sloping road (b) a tap handle (c) a steering wheel (d) a bottle opener
35. 35.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit farther from middle (d) sit closer to middle
36. 36.True or false: a magnet is needed for the ruler lever. (a) False (b) True
37. 37.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
38. 38.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
39. 39.True or false: a balloon is needed for the ruler lever. (a) True (b) False
40. 40.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed

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