Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 748 · 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.⚖️ 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) where the pencil is (b) distance from the pencil (c) the number of coins (d) the kind of coins
2. 2.⚙️ Which of these uses a pulley? (a) a ramp (b) a spoon lifting a lid (c) a see-saw (d) a flagpole
3. 3.⚖️ 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
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) which side goes down (b) distance from the pencil (c) the kind of coins
5. 5.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a doorknob (c) a spoon lifting a lid (d) a see-saw
6. 6.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
7. 7.🧺 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 balloon (d) a 30 cm ruler
8. 8.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the right side (b) neither, it balances (c) the left side (d) both go up
9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
10. 10.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
11. 11.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
12. 12.⚖️ 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 same ruler
13. 13.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) jump up and down (d) sit farther from middle
14. 14.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a slide (c) a steering wheel (d) a well pulley
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 kept the same. (a) False (b) True
16. 16.⚙️ Which of these uses a pulley? (a) a sloping road (b) a well pulley (c) a see-saw (d) a crowbar
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 the one thing we change. (a) True (b) False
18. 18.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a mirror (d) a 30 cm ruler
19. 19.⚖️ 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?
20. 20.⚖️ 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
21. 21.⚖️ 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) False (b) True
22. 22.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
23. 23.⚖️ 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 measure it (b) we change it (c) we keep it the same
24. 24.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
26. 26.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 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?
28. 28.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) press it gently (d) stand on the ruler
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a balloon (d) coins of one kind
30. 30.⚙️ Which of these is a lever? (a) a well pulley (b) a crane (c) a tap handle (d) a crowbar
31. 31.True or false: a crowbar is a lever. (a) False (b) True
32. 32.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil
33. 33.True or false: a doorknob is a wheel and axle. (a) True (b) False
34. 34.True or false: a balloon is needed for the ruler lever. (a) False (b) True
35. 35.⚖️ 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
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
37. 37.True or false: a spoon lifting a lid is a lever. (a) True (b) False
38. 38.⚖️ 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) distance from the pencil (c) which side goes down (d) the number of coins
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) where the pencil is
40. 40.True or false: a flat table is needed for the ruler lever. (a) False (b) True

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