Gravitation
Practice Test
1.
In Figure 7-5, if the mass of the planet were doubled, what effect would it have on its period of orbit?
a.
The new period would be twice the original period.
b.
The new period would be one-quarter of the original period.
c.
It would have no effect.
d.
The new period would be one-half of the original period.
Hint
2.
In Figure 7-5, if the radius of the planet's orbit were doubled, what effect would it have on its period of orbit?
a.
It would decrease.
b.
It would increase.
c.
More information is needed to determine the answer.
d.
It would have no effect.
Hint
3.
A satellite orbits Earth 5.00×10
2
km above its surface. What is its speed in orbit?
a.
7.76×10
3
m/s
b.
7.61×10
3
m/s
c.
5.92×10
3
m/s
d.
7.90×10
3
m/s
Hint
4.
A satellite orbits Earth 375 km above its surface. What is its speed in orbit?
a.
7.61 × 10
3
m/s
b.
7.68 × 10
3
m/s
c.
7.61 × 10
3
m/s
2
d.
7.68 × 10
3
m/s
2
Hint
