(a) Some believe that the positions of the planets at the time of birth influenc

Question

(a) Some believe that the positions of the planets at the time of birth influence the newborn. Others deride this and say that the gravitational force exerted on a baby by the obstetrician is greater than that exerted by the planets. To check this claim, first calculate the gravitational force exerted on a 4.8 kg baby by a 56.7 kg doctor who is 1.0 m away.

(b) Calculate the gravitational force exerted on the baby by the planet Jupiter (mJupiter = 1.9x1027kg) at its closest approach to the earth ( = 6.0x1011m).

(c) Calculate the gravitational force exerted on the baby by Jupiter at its greatest distance from the earth (= 9.0x1011m).

Explanation / Answer

here by using the formula

F = G * m * M / d^2

F = 6.67 * 10^-11 * 4.8 * 56.7 / (1^2)

F = 1.81 * 10^-8 N

b)

then

F = 6.67 * 10^-11 * 4.8 * 1.9 * 10^27 / ( 6 * 10^11)^2

F = 1.69 * 10^-6 N

c)

F = 6.67 * 10^-11 * 4.8 * 1.9 * 10^27 / ( 9 * 10^11)^2

F = 7.5 * 10^-7 N

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