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Class 19 Notes

# Class 19 Notes - A 10.0-kg child is riding in a car that is...

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11/9/09 Oregon State University PH 201, Lecture #19 A 10.0-kg child is riding in a car that is traveling at a constant speed of 20.0 m/s, and the car rounds a curve to the left, a curve whose radius is 100 m. Find the force that pushes the child to the right while the car is rounding the curve. 1. 0.0200 N 2. 2.00 N 3. 4.00 N 4. 40.0 N 5. None of the above.

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11/9/09 Oregon State University PH 201, Lecture #19 The Universal Law of Gravitation F G = W = ma = mg . But why is the earth’s surface value of local g (9.80 m/s 2 ) different than local g on the moon’s surface? Where does a local g value come from, anyway? Isaac Newton looked at data compiled by earlier astronomers and physicists and made a powerful mathematical connection between the behavior of ordinary projectiles here on Earth and the motions of the moon and the planets and sun: The gravitational force of attraction between any two masses, m 1 and m 2 , is given by F G = Gm 1 m 2 / r 2 , where r is the distance between the centers of the two masses, and G is a universal constant ( G = 6.67 x 10 -11 N·m 2 /kg 2 )
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Class 19 Notes - A 10.0-kg child is riding in a car that is...

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