![]() Check it out!Ī feather and a hammer were dropped at the same time on the moon.A new absolute determination of the acceleration due to gravity at the National Physical Laboratory has been made by timing the symmetrical free motion of a body moving under the attraction of gravity it is the first time this method has been used. The Brainiacs dropped cars to test Galileo's ideas about falling objects. How is the force of gravity on an object related to gravitational acceleration? If the mass of a falling object doesn't affect its motion, why does a feather fall slower that the g ball? Why did you have to be careful to throw the ball horizontally? What would have happened if you accidentally gave the ball a slightly upward initial velocity? What about a slightly negative initial velocity? Finally, if you saw that all objects fall at the same rate, you have verified Galileo's experiment – just like he supposed did at the Tower of Pisa. Did you discovered that regardless of the speed you threw the ball horizontally the time of the fall was the same? If so, you have shown that the horizontal motion does not affect the vertical motion. If you found that the time for the fall was about 0.45s, then you have verified the accepted value of the acceleration due to gravity is 9.8m/s 2.
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