Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 194 · 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 30 cm ruler is needed for the ruler lever. (a) True (b) False
2. 2.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a bottle opener (c) a flagpole (d) a slide
3. 3.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the same ruler (b) distance from the pencil (c) which side goes down
5. 5.⚖️ 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 keep it the same (b) we change it (c) we measure it
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) a magnet
7. 7.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
8. 8.⚖️ 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
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) False (b) True
10. 10.True or false: a crane uses a pulley. (a) False (b) True
11. 11.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) a round pencil (d) a flat table
12. 12.True or false: a steering wheel is a wheel and axle. (a) True (b) False
13. 13.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
14. 14.⚖️ 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
15. 15.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
16. 16.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a spoon lifting a lid (c) a tap handle (d) a crane
17. 17.⚖️ 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) the number of coins (c) distance from the pencil (d) which side goes down
18. 18.⚖️ 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
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) False (b) True
20. 20.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
21. 21.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
22. 22.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
23. 23.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a round pencil (c) a magnet (d) turmeric powder
24. 24.⚙️ Which of these is a lever? (a) a tap handle (b) a well pulley (c) a ramp (d) a see-saw
25. 25.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
26. 26.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a balloon (c) yeast (d) a battery cell
27. 27.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a doorknob (c) a crane (d) a see-saw
28. 28.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the lid gets softer (d) the spoon is magnetic
29. 29.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a bottle opener (c) a ramp (d) a crane
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a mirror (c) a 30 cm ruler (d) a flat table
31. 31.True or false: a slide is an inclined plane. (a) True (b) False
32. 32.True or false: a flagpole uses a pulley. (a) True (b) False
33. 33.True or false: a sloping road is a lever. (a) True (b) False
34. 34.⚖️ 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 change it (c) we keep it the same
35. 35.⚙️ Which of these is a lever? (a) a tap handle (b) a bottle opener (c) a crane (d) a flagpole
36. 36.True or false: a flagpole is an inclined plane. (a) True (b) False
37. 37.⚖️ 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 measure it (b) we keep it the same (c) we change it
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a flat table (d) turmeric powder
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) yeast
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?

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