Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 637 · 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.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a mirror (c) a magnet (d) a balloon
2. 2.⚙️ Which of these uses a pulley? (a) a crowbar (b) a slide (c) a ramp (d) a crane
3. 3.⚖️ 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) the kind of coins (c) distance from the pencil (d) the same ruler
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) a balloon
5. 5.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the right side (c) both go up (d) the left side
6. 6.True or false: a steering wheel is a wheel and axle. (a) False (b) True
7. 7.🧺 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 flat table (d) turmeric powder
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 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?
9. 9.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
10. 10.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the axle (d) the effort
11. 11.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crane (c) a flagpole (d) a steering wheel
12. 12.⚙️ Which of these is a lever? (a) a see-saw (b) a sloping road (c) a doorknob (d) a slide
13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
14. 14.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a bottle opener (c) a well pulley (d) a sloping road
15. 15.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) sit on the middle (d) jump up and down
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) distance from the pencil (c) which side goes down
17. 17.True or false: a doorknob is a lever. (a) False (b) True
18. 18.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) the kind of coins (c) distance from the pencil
20. 20.⚖️ 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 keep it the same (c) we measure it
21. 21.True or false: a slide is an inclined plane. (a) False (b) True
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 keep it the same (b) we change it (c) we measure it
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) a magnet
24. 24.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a spoon lifting a lid (d) a tap handle
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
26. 26.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
27. 27.⚖️ 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
28. 28.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) coins of one kind (c) yeast (d) turmeric powder
30. 30.True or false: a crowbar is an inclined plane. (a) False (b) True
31. 31.⚖️ 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
32. 32.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) harder (d) easier
33. 33.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a mirror (d) coins of one kind
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
36. 36.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
37. 37.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are magnetic (d) they are too cold
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
39. 39.⚖️ 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
40. 40.⚙️ Which of these uses a pulley? (a) a sloping road (b) a doorknob (c) a steering wheel (d) a well pulley

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