## What direction is the gravitational force of the orbiting object?

As a satellite moves around the Earth in a circular orbit, the direction of the force of gravity is always towards the centre of the Earth.

**What happens to an object close to Earth’s surface if it is given a speed exceeding 11.2 km s?**

What happens to an object close to Earth’s surface if it is given a speed exceeding 11.2 km/s? With such speed, called escape speed, the object continues to move away from Earth indefinitely.

**How would the period of an object in a circular orbit change if the radius of the orbit doubled?**

D the mass of the object being orbited and the distance between the objects. How would the period of an object in a circular orbit change if the radius of the orbit doubled? A The period would increase by a factor of 2.

### When a satellite travels at a constant speed the shape of its path is?

A satellite in orbit around Earth traces an oval-shaped path called an ellipse. An ellipse is the closed path taken by a point that moves in such a way that the sum of its distances from two fixed points is constant.

**What causes a satellite to move in a circular orbit?**

The direction of the satellite’s acceleration is not tangential to the circular motion, but rather perpendicular to its velocity/towards the centre of the earth. This acceleration is a result of earth’s gravitational force on the satellite. The acceleration is also known as centripetal acceleration.

**How is the speed of a satellite related to its velocity?**

Speed – is a scalar quantity, which only has magnitude. Velocity – is a vector quantity, it possesses both magnitude and direction. A geostationary satellite orbits the earth with a velocity of 3.07km/s. So, the satellite orbits the earth with a constant speed of 3.07km/s because the magnitude of its speed is constant.

#### What is the force of gravity on a satellite?

The force of gravity on the satellite is the centripetal force. Key concept: Speed – is a scalar quantity, which only has magnitude. Velocity – is a vector quantity, it possesses both magnitude and direction. A geostationary satellite orbits the earth with a velocity of 3.07km/s.