Q. 3

Expert-verifiedFound in: Page 353

Book edition
4th

Author(s)
Randall D. Knight

Pages
1240 pages

ISBN
9780133942651

The centers of a 10 kg lead ball and a 100 g lead ball are separated by 10 cm.

a. What gravitational force does each exert on the other? b. What is the ratio of this gravitational force to the gravitational force of the earth on the 100 g ball?

a) The force exerted is 6.67 x 10^{-7} N

b) The ratio of gravitational force is 6.80 x 10^{-7}

Mass of ball 1 is m_{1}=10 kgMass of ball 2 is m_{2}= 100 g =0.10 kg Distance between balls, r=10 cm=0.10 m

Gravitational force can be calculated between two object by

Using this calculate the force between objects

Mass of ball 1 is m_{1}=10 kgMass of ball 2 is m_{2}= 100 g =0.10 kg Distance between balls, r=10 cm=0.10 m

Gravitational force by earth is

W = mg = 0.1 x 9.8 m/s^{2}= 0.98 N

Now use the gravitational force calculated in part(a) to get the ratio

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