The Earth's gravity exerts no torque on a satellite orbiting the Earth in an elliptical orbit. Compare the motion at the point nearest the Earth (perigee) to the motion at the point farthest from the Earth (apogee). At the point closest to the Earth:

a. the angular speed will be greatest although the linear speed will be the same.
b. the speed will be greatest although the angular speed will be the same.
c. the kinetic energy and angular momentum will both be greater.
d. None of the above.


D

Physics & Space Science

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Addition by Components: The components of vectors  and  are given as follows:Ax = 7.6 Bx = -5.1Ay = -9.2 By = -6.8What is the magnitude of the vector difference  -  ?

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Suppose that the speed of an electron traveling 1.0 km/s is known to an accuracy of 1 part in 105 (i.e., within 0.01%). What is the greatest possible accuracy within which we can determine the position of this electron?

What will be an ideal response?

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A child throws a ball with an initial speed of 8.0 m/s at an angle of 40° above the horizontal. The ball leaves her hand 1.0 m above the ground. At what angle below the horizontal does the ball approach the ground assuming no effects of air?

A) 35° B) 42° C) 48° D) 40° E) 65°

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