Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 437 · 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 ramp is an inclined plane. (a) True (b) False
2. 2.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
3. 3.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) yeast (d) a flat table
5. 5.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
6. 6.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a flat table (c) a round pencil (d) a 30 cm ruler
8. 8.⚖️ 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
9. 9.🛟 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
10. 10.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a flat table (c) a round pencil (d) a 30 cm ruler
11. 11.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
12. 12.⚖️ 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 measure it (c) we change it
13. 13.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
14. 14.⚖️ 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 change it (b) we measure it (c) we keep it the same
15. 15.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
16. 16.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) jump up and down (c) sit farther from middle (d) sit closer to middle
17. 17.True or false: a slide is an inclined plane. (a) False (b) True
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
19. 19.⚖️ 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 measure it (c) we change it
20. 20.⚙️ Which of these is a lever? (a) a ramp (b) a slide (c) a tap handle (d) a spoon lifting a lid
21. 21.⚖️ 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 magnetic (d) the spoon is hot
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) a 30 cm ruler (d) a round pencil
23. 23.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
24. 24.⚖️ 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
25. 25.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a doorknob (c) a slide (d) a flagpole
26. 26.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
27. 27.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
28. 28.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a flagpole (c) a ramp (d) a well pulley
29. 29.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
30. 30.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a well pulley (c) a slide (d) a tap handle
31. 31.⚖️ 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 same ruler (b) the kind of coins (c) which side goes down (d) where the pencil is
32. 32.⚙️ Which of these uses a pulley? (a) a slide (b) a sloping road (c) a flagpole (d) a doorknob
33. 33.⚖️ 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 same ruler (b) where the pencil is (c) distance from the pencil (d) the kind of coins
34. 34.⚙️ Which simple machine is a sloping road? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a 30 cm ruler (c) a flat table (d) a round pencil
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a battery cell (d) coins of one kind
37. 37.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
38. 38.⚙️ Which of these is an inclined plane? (a) a crane (b) a well pulley (c) a tap handle (d) a slide
39. 39.⚙️ Which of these is a lever? (a) a steering wheel (b) a bottle opener (c) a sloping road (d) a flagpole
40. 40.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crane (c) a flagpole (d) a well pulley

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