Planetary motion and gravitation

Kepler's second law or the equal area law states that the closer a planet is to the sun the ________ it travels. 

• Faster 
• Slower
• Higher
• Lower

This model best illustrates which of the following laws?

• Kepler's 2nd Law of Motion
• Newton's 1st Law of Motion
• Kepler's 3rd Law of Motion
• Newton's Law of Universal Gravitation

Planets revolve around the sun in an elliptical orbit. Is this Kepler's 1st, 2nd, or 3rd Law? ?  

• 1st
• 2nd
• 3rd
• None

Two satellites are in orbit around a planet. One satellite has an orbital radius of 8.0×10⁶ m. The period of revolution for this satellite is 1.0×10⁶ s. The other satellite has an orbital radius of 2.0×10⁷ m. What is this satellite’s period of revolution?

• 5.0×10⁵ s

• 4.0×10⁶ s

• 2.5×10⁶ s

• 1.3×10⁷ s

What shape is Earth's orbit?

• circle

• ellipse

• square

• spiral

Tags

NGSS.HS-ESS1-4

An ellipse is drawn around two points called

• aphelion
• perihelion
• foci
• axis

When a planet orbits the Sun, one of the foci of the elliptical orbit is 

• the axis
• the perihelion
• the center
• the Sun

Which of the following is Newton's Law on Gravitation?

• F=Gm₁m₂/r
• F = Gm₁m₂/r²
• F = Gm₁m₂/2r
• F = m₁m₂/2r

Tags

NGSS.HS-PS2-4

Earth (m_earth = 5.97x10²⁴kg) orbits the sun (m_sun=1.99x10³⁰kg) at a mean distance of 1.50 x 10¹¹kg. What is the gravitational force of the Sun on the Earth? (G=6.67x10^-11Nm²kg^-2)

• 5.29 x 10³²N

• 3.52 x 10²²N

• 5.90 x 10^-2N

• 1.77 x 10^-8

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

The path that a body follows as it travels around another body in space

• rotation

• orbit

• revolution