Strength Test Force And Motion Science Experiment
In this fun and easy force and motion science experiment for kids, we’re going to test the strength of string with a heavy book.
- 24 inch long piece of string
- Heavy book
- Lay the string out on a table.
- Center the heavy book on the string.
- Tie the string around the book without making a knot.
- Take one end of the string and lift the book.
- Now pull on either end of the string and try to make the string in a straight line.
- No matter how strong you are you will not be able to pull the string straight.
How it Works:
You may actually notice that the further you pull the string ends apart, the heavier the books seems to weigh. The greater the angle between the two halves of the string, the greater the force will be needed to hold the book up. If the string was in a straight line, this would be a 180 degree angle and would require an impressive amount of force and strength to hold the book up. So much force would be needed that the string would probably actually break before being able to make a straight line.
Make This A Science Project:
Use different weights of books. Use different sizes, shapes, and weights of items. Try different diameters and types of string, yarn, and rope.