A planet of mass 9.25x 1024 kg is at location( 4.75x 1011 3.00x 1011 0) m A star

Question

A planet of mass 9.25x 1024 kg is at location( 4.75x 1011 3.00x 1011 0) m A star of mass 6.25x 1030 kg is at location 4.00x 1011 4.00× 1011 0)In. Ît will be useful to draw a diagram of the situation, including the relevant vectors. What is the relative position vector pointing from the planet to the star? r- 875000000000 m , 700000000000 m , 0 m You are correct. Your receipt no. is 162-8997Frevious Iries What is the distance between the planet and the star? IrT= 12012m Submit Answer Incorrect. Tries 1/5 Previous Tries What is the unit vector r'in the direction of r? Submit Answer Tries 0/5 What is the magnitude of the force exerted on the planet by the star?

Explanation / Answer

b)

|r|= 11.2*10^11 m

c)

r unit vector= r/|r|= (-8.75i + 7j)/11.2

= < -0.78, 0.625, 0 > m

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d) F= GMm/r^2= 6.67*10^-11* 9.25*10^24*6.25*10^30/(11.2*10^11)^2

F= 3.07*10^21 N

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Comment in case any doubt.. good luck

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