PRE-LAB ACTIVITY Consider the Earth revolving around the Sun. Draw a free-body d

Question

PRE-LAB ACTIVITY Consider the Earth revolving around the Sun. Draw a free-body diagram for the Earth ignoring the influence of all celestial objects but the Sun. Include all forces 1. 2. Is the Earth in equilibrium at any instant? Why? Why not? S. Later in this course you will learn that the magnitude of the gravitational force F between two objects of mass mi and m2 separated by a distance r is given by m,m where G is universal gravitational constant G-6.67 × 10-11 Calculate the gravitational force on the Earth due to the Sun, given that 1.49 × 1011m1 msun = 1 .99 × 1030 kg , m2Earth-5.98x 1024 kg, and 'sun-Earth Find the centripetal force on the Earth due to the Sun using What is the origin of Fe? Compare your answer for Fe with your answer in question 3 above 4. = ma Draw free body diagrams for the rotating mass (C) shown in the figure below for the cases when it is not rotating and being pulled by the hanging mass (procedure 4), and when it is rotating (procedure 7) 5. Not Rotating Rotating

Explanation / Answer

3) F = Gm1m2 / r^2

= 6.67*10^-11*1.99*10^30 *5.98*10^24 / (1.49*10^11)^2

= 3.57*10^22 N

so the force of attraction is 3.57*10^22 N

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