7.1 - Kepler's Laws and Newton's Law of Universal Gravitation

According to Kepler's first law, the paths of the planets are circular in shape.

• True

• False

Which of those have highly elliptical orbits?

• Planets

• Satellites

• Comets

Tags

NGSS.HS-ESS1-4

Which law states that the areas at equal time intervals of a planet are equal?

• Kepler's first law

• Kepler's second law

• Kepler's third law

• Newton's law of universal gravitation

Tags

NGSS.HS-ESS1-4

Planets are faster when closer to the Sun because

• Distance is greater, time is greater

• Distance is greater, time is smaller

• Distance is smaller, time is smaller

• Distance is greater, time is the same

Tags

NGSS.HS-ESS1-4

Kepler's third law is represented by the following equation:

• 
• 
• 
• 

Tags

NGSS.HS-ESS1-4

Kepler's third law can be applied to any two bodies as long as they are orbiting around a single common body.

• True

• False

Tags

NGSS.HS-ESS1-4

Which equation represents Newton's law of universal gravitation?

•  $F_g=\frac{Gm_1m_2}{r}$  

•  $F_g=\frac{Gm_1m_2}{r^2}$  

•  $F_g=\frac{m_1m_2}{Gr^2}$  

•  $F_g=\frac{Gm_1r^2}{m_2}$  

Tags

NGSS.HS-PS2-4

When the distance between two objects is doubled, in terms of $F_g,$ the force of gravity between them will be

• 
  

   $2F_g$  
  

•  $4F_g$  

•  $\frac{1}{2}F_g$  

•  $\frac{1}{4}F_g$  

Tags

NGSS.HS-PS2-4

Find Mercury's period around the Sun in Earth years. Use Table 1 on page 180.

• 0.240 years

• 0.386 years

• 0.621 years

Tags

NGSS.HS-ESS1-4

Find the force of gravitation between two 5.0 kg balls that are 1.5 m apart.
Use $G=6.67\times10^{-11}\ \frac{N.m^2}{kg^2}$  

• 
  

   $1.5\times10^{-10}\ N$  
  

•  $7.4\times10^{-10}\ N$  

•  $1.1\times10^{-9}\ N$  

Tags

NGSS.HS-PS2-4