Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 765 · 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 steering wheel is a wheel and axle. (a) True (b) False
2. 2.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) sit closer to middle (d) jump up and down
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
4. 4.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
5. 5.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) bend it till it snaps (d) flick coins at faces
6. 6.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
7. 7.⚖️ 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 measure it (b) we keep it the same (c) we change it
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
9. 9.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
10. 10.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
11. 11.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
12. 12.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
13. 13.⚖️ 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) True (b) False
14. 14.True or false: a bottle opener uses a pulley. (a) True (b) False
15. 15.⚖️ 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 kind of coins (b) the number of coins (c) where the pencil is (d) distance from the pencil
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
17. 17.True or false: a see-saw uses a pulley. (a) False (b) True
18. 18.True or false: a slide uses a pulley. (a) False (b) True
19. 19.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
20. 20.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) a mirror
22. 22.True or false: a flagpole is a lever. (a) True (b) False
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) turmeric powder
24. 24.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) a balloon
25. 25.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crowbar (c) a crane (d) a doorknob
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) coins of one kind (d) a round pencil
27. 27.True or false: a ramp is an inclined plane. (a) True (b) False
28. 28.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a flat table (d) yeast
30. 30.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
31. 31.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they may swallow them (d) they are magnetic
32. 32.True or false: a slide is an inclined plane. (a) False (b) True
33. 33.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a tap handle (c) a crowbar (d) a sloping road
34. 34.⚙️ Which of these is a lever? (a) a tap handle (b) a spoon lifting a lid (c) a sloping road (d) a well pulley
35. 35.True or false: a steering wheel uses a pulley. (a) False (b) True
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False
37. 37.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a crane (c) a slide (d) a steering wheel
38. 38.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) yeast (d) coins of one kind
40. 40.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane

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