Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 7 · 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: coins of one kind is needed for the ruler lever. (a) False (b) True
2. 2.⚖️ 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 change it (c) we measure it
3. 3.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a bottle opener (c) a well pulley (d) a sloping road
4. 4.True or false: a flagpole uses a pulley. (a) False (b) True
5. 5.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the spoon is magnetic (d) the lid gets softer
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) the same (d) impossible
7. 7.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
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) both go up (c) the left side (d) neither, it balances
9. 9.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
10. 10.True or false: a crane uses a pulley. (a) False (b) True
11. 11.True or false: a mirror is needed for the ruler lever. (a) True (b) False
12. 12.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
13. 13.True or false: a magnet is needed for the ruler lever. (a) True (b) False
14. 14.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a balloon (d) coins of one kind
15. 15.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the effort (d) the load
16. 16.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a spoon lifting a lid (c) a sloping road (d) a well pulley
17. 17.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
18. 18.⚙️ Which of these is a lever? (a) a crane (b) a doorknob (c) a well pulley (d) a crowbar
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 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?
20. 20.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
21. 21.⚖️ 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 change it (b) we keep it the same (c) we measure it
22. 22.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a battery cell (d) coins of one kind
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a flat table (d) yeast
25. 25.⚖️ 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) True (b) False
26. 26.⚙️ Which of these is a lever? (a) a flagpole (b) a ramp (c) a doorknob (d) a spoon lifting a lid
27. 27.⚖️ 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 kind of coins (b) distance from the pencil (c) which side goes down
28. 28.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
29. 29.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) sit farther from middle (d) jump up and down
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
31. 31.🧺 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
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) a magnet
33. 33.True or false: a sloping road is an inclined plane. (a) False (b) True
34. 34.True or false: a tap handle is a wheel and axle. (a) True (b) False
35. 35.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
36. 36.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
37. 37.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
38. 38.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
39. 39.⚙️ Which of these uses a pulley? (a) a slide (b) a ramp (c) a steering wheel (d) a crane
40. 40.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a flagpole (c) a bottle opener (d) a ramp

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