Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 367 · 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? What do we do with “the same ruler”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
3. 3.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a flagpole (c) a well pulley (d) a crane
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
5. 5.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
6. 6.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) a flat table (d) a mirror
7. 7.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) which side goes down (c) the number of coins (d) where the pencil is
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) turmeric powder (d) a flat table
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 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?
12. 12.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
13. 13.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
14. 14.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a slide (c) a tap handle (d) a sloping road
15. 15.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a balloon (c) a mirror (d) a round pencil
16. 16.⚖️ 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) True (b) False
17. 17.True or false: a steering wheel is an inclined plane. (a) True (b) False
18. 18.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
19. 19.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
20. 20.True or false: a crane uses a pulley. (a) True (b) False
21. 21.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
22. 22.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a ramp (c) a sloping road (d) a see-saw
23. 23.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit farther from middle (d) sit on the middle
24. 24.True or false: a doorknob is a wheel and axle. (a) True (b) False
25. 25.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a balloon (c) coins of one kind (d) a magnet
26. 26.⚙️ Which of these uses a pulley? (a) a see-saw (b) a spoon lifting a lid (c) a well pulley (d) a tap handle
27. 27.True or false: a doorknob is an inclined plane. (a) True (b) False
28. 28.True or false: a mirror is needed for the ruler lever. (a) True (b) False
29. 29.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
30. 30.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
31. 31.True or false: a crane is an inclined plane. (a) False (b) True
32. 32.True or false: a well pulley uses a pulley. (a) False (b) True
33. 33.⚖️ 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 keep it the same (b) we measure it (c) we change it
34. 34.True or false: a crowbar is a lever. (a) True (b) False
35. 35.⚖️ 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 number of coins (b) distance from the pencil (c) which side goes down (d) the same ruler
36. 36.⚙️ Which of these is a lever? (a) a well pulley (b) a slide (c) a bottle opener (d) a flagpole
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a battery cell (c) a flat table (d) a round pencil
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
39. 39.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
40. 40.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed

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