- Use a 50g mass and tie a 1meter string (cotton twine) to it.
- Tape the string to the desk so the mass is just barely above the floor. This is now a pendulum.
- Use a wooden cube (mine was about 2in x2in) and place it just in front of the pendulum. Place a piece of tape where the block starts.
- Pull the pendulum 15 cm off the ground using a ruler. Make sure the string it taut.
- Release and have the pendulum hit the cube.
- Measure the distance the cube traveled.
- Repeat 3 times
- Find the average distance.
- Repeat steps 4-8 but this time release the pendulum from 30 cm.
The other lab we did today. All you need is 1 pencil (if you still have any left!!! My kids keep on losing theirs... like that's anything new...) 2 cm rulers, 1 meter stick, and washers. Prior to the lab day, you will need to hot glue some washers together. You need a set of 2 washers glued together, 3, 4, 5, and 10. You will also need a single washer. You can do this with pennies if you would rather, but the washers were a size bigger than the penny, and I didn't have to worry about greedy fingers....
- Place a ruler on top of a pencil that is at the 18cm mark on the ruler. This creates a sort of see-saw.
- Place the single washer on the end that is touching the table.
- Hold your meter stick up next to the washer. This guy is about to fly and you need to see how high it jumps.
- Release the 2washers that have been glued together from 30cm (the height of the 2nd ruler) and have it hit the other ruler, thus making the single washer jump up.
- Repeat 3 times.
- Find average.
- Repeat Steps 4-7 except use the other washers.
By doing both of these 2 labs, students were able to see that force depends on the height something is released from or how much mass it has.
In closing... I showed this lovely little video to the kids about Isaac Newton and his 3 Laws of Motion. I LOVE it when I can put a famous scientist into the lesson.... we even made a little foldable book on him after watching the video. Click on the picture and it will take you to the link :)
May the force is with you!!!