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Science - Inclined Planes
Current Event-Antiques Stolen in Iraq
Monthly Math Challenge
P.E. Challenge
I did a few experiments with ramps. When you are trying to push something uphill, it is easier to use a long ramp with a big angle. You use less force to push it even though you are moving a longer distance. If you use a short, steep ramp, you have to use more force.
On the other hand, if you want to roll something down a ramp and make it go far, it is better to have a high ramp with a small angle. I rolled a car down 2 ramps. One was 12 1/2 inches high and one was 5 inches. Both ramps were 24 inches long. There was more force pulling the ramp down the 12 1/2 inch high ramp and the car rolled farther than on the 5 inch ramp.
Try out some ramp experiments at home. They are easy and fun.
Some of the religious leaders in Iraq have asked their followers to give back the things that have been stolen. Many things have been returned. These things are important to the history of Iraq, but they are also important to everyone because they help us understand about the first civilizations.
Bob has one blue baseball cap, one red baseball cap, a black shirt, a white shirt and a striped shirt, a pair of jeans and a pair of sweatpants. If he wants to wear one hat, one shirt and one pair of pants every day, how many different outfits can he make?
Last month the challenge was to divide this drawing into 4 equal shapes(same size and shape) using exactly 4 straight lines. Did you do it? See the bottom of this page for the answer.
