Gravitational Field and Acceleration due to gravity

Gravitational Field and Acceleration due to gravity

Objective:

To calculate the acceleration due to gravity.

Multiple Choice

Starter: Which formula can be used for calculating the orbital speed of the satellite

• A

• B

• C

• D

Multiple Choice

Which formula can be used for calculating the time period of the satellite

• A

• B

• C

• D

Multiple Choice

Which formula can be used for calculating acceleration due to gravity at the surface of earth?

• A

• B

• C

• D

Multiple Choice

To convert km to m, what should we do?

• multiply by 100

• multiply by 1000

• divide by 100

• divide by 1000

Open Ended

A satellite orbits Earth 270 km above Earth’s surface. Calculate the free-fall acceleration at this altitude.

 $M_{e\ }=5.98\times10^{24\ }kg,\ \ R_{e\ }=6.38\times10^6m,\ G=6.67\times10^{-11}$ Use the formula $g=\frac{GM}{r^2}$  

Multiple Choice

What is the gravitational field strength of the Earth at a distance of 200 km from the Earth’s surface?

 $M_{e\ }=5.98\times10^{24\ }kg,\ r_e=6.38\times10^6m,G=6.67\times10^{-11}$  

• 9.8

• 9.2

• 10.0

Open Ended

Write about one thing which you learnt in this class.