Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 65 · 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 flagpole is a wheel and axle. (a) True (b) False
2. 2.⚙️ Which of these is a lever? (a) a flagpole (b) a sloping road (c) a crowbar (d) a crane
3. 3.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) coins of one kind (d) a flat table
4. 4.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they are too cold (d) they may swallow them
5. 5.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
6. 6.⚖️ 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
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the kind of coins (c) distance from the pencil (d) where the pencil is
8. 8.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) stand on the ruler (d) press it gently
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) True (b) False
10. 10.⚖️ 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 number of coins
11. 11.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the axle (d) the load
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 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?
13. 13.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is hot (d) the spoon is magnetic
14. 14.⚙️ Which of these is an inclined plane? (a) a slide (b) a tap handle (c) a crane (d) a see-saw
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) distance from the pencil (c) where the pencil is (d) the number of coins
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 10 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?
17. 17.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) bigger on the left (d) zero
18. 18.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a mirror (d) a 30 cm ruler
19. 19.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a crane (c) a sloping road (d) a bottle opener
20. 20.⚙️ Which of these is a wheel and axle? (a) a slide (b) a spoon lifting a lid (c) a ramp (d) a doorknob
21. 21.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
22. 22.True or false: a mirror is needed for the ruler lever. (a) True (b) False
23. 23.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a tap handle (c) a slide (d) a spoon lifting a lid
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a round pencil (d) a 30 cm ruler
25. 25.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
26. 26.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
27. 27.⚙️ Which of these uses a pulley? (a) a crowbar (b) a tap handle (c) a well pulley (d) a sloping road
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a 30 cm ruler (c) coins of one kind (d) a flat table
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) a battery cell
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
31. 31.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
32. 32.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) sit farther from middle (d) jump up and down
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
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.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 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?
36. 36.True or false: a slide is an inclined plane. (a) True (b) False
37. 37.⚖️ 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
38. 38.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
39. 39.⚙️ Which of these is a wheel and axle? (a) a slide (b) a spoon lifting a lid (c) a sloping road (d) a steering wheel
40. 40.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids