Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 76 · 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 what we measure? (a) the kind of coins (b) the same ruler (c) which side goes down (d) where the pencil is
2. 2.⚙️ Which of these is a lever? (a) a tap handle (b) a slide (c) a sloping road (d) a see-saw
3. 3.True or false: a mirror is needed for the ruler lever. (a) True (b) False
4. 4.⚙️ Which of these uses a pulley? (a) a crowbar (b) a well pulley (c) a slide (d) a bottle opener
5. 5.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
6. 6.True or false: a crane is a wheel and axle. (a) False (b) True
7. 7.⚖️ 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 change it (b) we measure it (c) we keep it the same
8. 8.⚖️ 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) distance from the pencil (b) the number of coins (c) the kind of coins (d) which side goes down
9. 9.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
10. 10.⚙️ Which simple machine is a see-saw? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
11. 11.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
12. 12.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a steering wheel (c) a ramp (d) a see-saw
13. 13.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) equal on both sides (d) bigger on the left
14. 14.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a battery cell (c) a 30 cm ruler (d) a round pencil
15. 15.🛟 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
16. 16.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
17. 17.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the fulcrum (d) the axle
18. 18.⚖️ 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
19. 19.True or false: a steering wheel is an inclined plane. (a) False (b) True
20. 20.⚙️ Which of these uses a pulley? (a) a flagpole (b) a crowbar (c) a sloping road (d) a see-saw
21. 21.⚖️ 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
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) bend it till it snaps (d) press it gently
24. 24.⚖️ 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) where the pencil is (c) which side goes down
25. 25.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) neither, it balances (c) the right side (d) the left side
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
27. 27.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
28. 28.⚙️ Which of these uses a pulley? (a) a sloping road (b) a steering wheel (c) a crane (d) a bottle opener
29. 29.True or false: a doorknob is a wheel and axle. (a) False (b) True
30. 30.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
31. 31.🧺 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 flat table (d) a mirror
32. 32.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
33. 33.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
34. 34.⚖️ 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
35. 35.⚖️ 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 keep it the same (b) we change it (c) we measure it
36. 36.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
37. 37.⚙️ Which of these is a lever? (a) a tap handle (b) a slide (c) a crowbar (d) a flagpole
38. 38.True or false: yeast is needed for the ruler lever. (a) False (b) True
39. 39.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a battery cell (d) a 30 cm ruler

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