Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 75 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a balloon (d) coins of one kind
2. 2.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) yeast (d) coins of one kind
4. 4.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
5. 5.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a ramp (c) a see-saw (d) a slide
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
7. 7.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are too shiny (d) they are magnetic
8. 8.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) True (b) False
10. 10.⚖️ 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
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
12. 12.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
14. 14.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) the spoon is magnetic (d) a lever boosts your push
15. 15.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
16. 16.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
17. 17.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil. How many coins must you place 4 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? True or false: the kind of coins is what we measure. (a) True (b) False
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the number of coins (c) distance from the pencil (d) the same ruler
21. 21.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
22. 22.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
23. 23.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
24. 24.⚙️ Which of these is a lever? (a) a well pulley (b) a spoon lifting a lid (c) a slide (d) a ramp
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
26. 26.⚖️ 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 measure it (b) we keep it the same (c) we change it
27. 27.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a tap handle (c) a slide (d) a see-saw
28. 28.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
29. 29.True or false: a flagpole is a lever. (a) False (b) True
30. 30.🧺 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
31. 31.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
32. 32.True or false: a slide is an inclined plane. (a) False (b) True
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
34. 34.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a spoon lifting a lid (c) a ramp (d) a doorknob
35. 35.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a see-saw (c) a ramp (d) a bottle opener
36. 36.True or false: a slide is a lever. (a) True (b) False
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) coins of one kind (d) a flat table
38. 38.True or false: yeast is needed for the ruler lever. (a) True (b) False
39. 39.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False

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