Escape Velocity

The expression for orbital  velocity of an object is ….

•  $\sqrt{\frac{GM}{R}}$ 

•  $\sqrt{\frac{GM}{2R}}$ 

• $\sqrt{\frac{GM}{R^2}}$

• $\sqrt{\frac{2GM}{R^2}}$

The orbital velocity of an object in an orbit around the earth for a piece of 1 g is 8.2 km/s. What would it be for a piece of 10 g in the same orbit?

• 82 km/s

• 8.2 km/s

• 16.4 km/s

• 4.1 km/s

An elephant and an ant are to be projected out of the gravitational pull of the earth. What should be the velocities of the elephant and the ant?

• elephant has more escape velocity

• ant has more escape velocity

• different velocity

• same velocity

The orbital velocity of a planet depends only upon the

• neither the mass of the planet nor the mass of the object

• mass of the planet and the object

• mass of the planet

Which planet in our solar system will have the fastest orbital  speed?

• Venus 
• Earth 
• Saturn 
• Mercury 

Tags

NGSS.HS-ESS1-4