F4 Chapter 3.3 Man made satellites

Which of the following is the characteristic of non-geostationary satellites?

• Direction of rotation is the same as direction of the Earth rotation

• Orbit period can be more or less than 24 hours

• Used to communicate throughout the whole world

• The position of satellite is above the same geographical location on the Earth surface

Diagram below shows a satellite is launched from a point P above the Earth with a velocity that is less than the velocity for it to go into circular orbit. Which is the path of the satellite after launch?

• A

• B

• C

• D

A satellite is in circular orbit at a constant height h above the Earth's surface. The mass of the Earth is M and its radius is R. If G is the universal gravitational constant, which is the correct expression for the speed,v of the satellite?

The escape velocity of a rocket from the earth does not depend on

• the mass of the rocket

• the mass of the Earth

• the radius of the Earth

• the height of the rocket from the Earth's surface

The escape velocity from the surface of the Earth of radius R is v. What is the escape velocity from a height of 2R from the surface of the Earth?

Which of the following gas molecules is likely to escape from the Earth's atmosphere?

• Carbon dioxide

• Nitrogen

• Hydrogen

• Oxygen

Diagram shows two star P and Q are of mass M and 2M respectively. The radius of star P is R and the radius of star Q is 2R. What is the escape velocity from planet P compared to Q?

• 1

• 2

Which statement about geostationary satellite is true?

• The radius of the orbit equals twice the radius of the Earth

• The period of orbit is 15hours

• The satellite appears stationary relative to points on the surface of the Earth

• Direction of the satellite rotating is opposite direction of Earth's rotation

Which statement below is correct?

• Commercial aircrafts or jets can fly at high altitude because of they can overcome the escape velocity easily.

• Atmosphere happen at earth because the linear speed of molecules in the atmosphere is less than escape velocity.

• Rocket has a velocity that is lower than escape velocity so that it can move to outer space.

• The greater the mass of the planet the lower the escape velocity of the planet.