Exam 6 Physics Numbers 11-15

1. 14. How would the speed of Earth's orbit around the sun change if Earth's distance from the sun increased by 4 times?

It would increase by a factor of 2.

It would increase by a factor of 4.

It would decrease by a factor of 2.

The speed would not change.

2. 15. The law of planetary motion that relates the speed of a planet to its position in its orbit about the Sun is:

Kepler's first law

Kepler's third law

The Law of Equal Areas

The Law of Inertia

3. 12. In the equation for the speed of an object in circular orbit, what does m represent in this equation?

The mass of the sun

The mass of Earth

The mass of the central object

The mass of the orbiting object

4. In the figure, according to Kepler's laws of planetary motion,

A1 = A2.

Delta t1 > delta t2.

If delta t1 = delta t2, then the orbit is circular.

If delta t1 = delta t2, then A1 = A2.

5. 13. How would the speed of Earth's orbit around the sun change if Earth's mass increased by 4 times?

It would increase by a factor of 2.

It would increase by a factor of 4.

It would decrease by a factor of 2.

The speed would not change.