Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 474 · 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.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the effort (d) the axle
2. 2.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
3. 3.🔮 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 left side (b) neither, it balances (c) both go up (d) the right side
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) distance from the pencil (b) which side goes down (c) the same ruler
5. 5.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) the spoon is hot (d) a lever boosts your push
6. 6.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
7. 7.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
8. 8.⚙️ Which of these uses a pulley? (a) a sloping road (b) a steering wheel (c) a ramp (d) a flagpole
9. 9.⚖️ 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 same ruler (b) where the pencil is (c) distance from the pencil (d) the number of coins
10. 10.⚖️ 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
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) the same ruler (c) distance from the pencil (d) which side goes down
12. 12.True or false: a steering wheel is an inclined plane. (a) False (b) True
13. 13.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit on the middle (d) sit farther from middle
14. 14.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
15. 15.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a crowbar (c) a see-saw (d) a sloping road
16. 16.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) stand on the ruler (d) bend it till it snaps
17. 17.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a flagpole (c) a crowbar (d) a well pulley
18. 18.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
19. 19.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a bottle opener (c) a crowbar (d) a ramp
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) turmeric powder (d) a round pencil
21. 21.⚙️ Which of these is a lever? (a) a sloping road (b) a well pulley (c) a flagpole (d) a crowbar
22. 22.⚖️ 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 measure it (c) we change it
23. 23.🛟 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
24. 24.⚖️ 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
25. 25.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
26. 26.⚖️ 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
27. 27.⚖️ 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) False (b) True
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a balloon (c) a flat table (d) a round pencil
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a round pencil (c) a flat table (d) a 30 cm ruler
31. 31.True or false: a tap handle is a wheel and axle. (a) True (b) False
32. 32.True or false: a magnet is needed for the ruler lever. (a) False (b) True
33. 33.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) equal on both sides (d) bigger on the left
34. 34.🧺 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 battery cell
35. 35.True or false: a bottle opener uses a pulley. (a) True (b) False
36. 36.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 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?
38. 38.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a battery cell (c) a round pencil (d) a 30 cm ruler
39. 39.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a flat table (c) a mirror (d) a battery cell
40. 40.True or false: a crane is a lever. (a) True (b) False

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