# Why does a satellite in a circular orbit travel at a constant speed?

Why does a satellite in a circular orbit travel at a constant speed? The net force acting on the satellite is zero. The gravitational force acting on the satellite is balanced by the centrifugal force acting on the satellite. There is a force acting opposite to the direction of the motion of the satellite.

An object moving in a circular orbit at a constant speed has a changing velocity. This is because velocity is a vector quantity that depends on speed and direction. The object in orbit is accelerating, even though its speed remains constant, because its velocity is changing.

One may also ask, what is constant for a satellite in orbit? When in circular motion, a satellite remains the same distance above the surface of the earth; that is, its radius of orbit is fixed. Furthermore, its speed remains constant. Since kinetic energy is dependent upon the speed of an object, the amount of kinetic energy will be constant throughout the satellite’s motion.

Also Know, why does a satellite travel at a constant speed?

Answer and Explanation: A satellite in a circular orbit travel at a constant speed because during revolution direction change at every instant and speed is constant. Speed doesn’t depends on direction , it is a scalar quantity. Velocity is depends on the direction , it is a vector quantity.

Why does a satellite move in a circular orbit?

In a circular orbit, the path of the satellite is parallel to the Earth’s surface. The gravitational force doesn’t change the speed of a satellite in circular orbit because the force is always perpendicular to the direction of motion of the satellite.

### What are 3 examples of centripetal force?

Some examples: Twirling a lasso, spinning a ball on a string(Like a Bola): Centripetal Force is provided by the force of tension on the rope pulls the object in toward the center. Turning a car: Centripetal Force is provided by the force of Friction between the wheels and the ground.

### Can you go around a curve with constant acceleration?

——— (a) Yes. Rounding a curve at constant speed means you are accelerating toward the center of the circle. Even though your speed is constant, your velocity vector is changing, so your acceleration is nonzero. If you follow a curve, the direction of velocity must change.

### Do satellites have constant velocity?

It doesn’t move with constant velocity. Velocity is a vector including direction of motion as well as speed. Even in a perfectly circular orbit with constant speed, a satellite is continuously changing direction.

### Is acceleration constant in uniform circular motion?

Acceleration is a change in velocity, either in its magnitude—i.e., speed—or in its direction, or both. In uniform circular motion, the direction of the velocity changes constantly, so there is always an associated acceleration, even though the speed might be constant.

### Why does mass not affect centripetal acceleration?

Mass does not affect centripetal acceleration but it. This preview shows page 9 – 12 out of 18 pages. the as the velocity of a spinning object increases, the centripetal force increases as well. Due to this, centripetal force must be proportional to the square of the velocity.

### Is there an outward force in circular motion?

A centrifugal or outward net force simply does not exist. To make the circular motion, there must be a net or unbalanced force directed towards the center of the circle in order to deviate the object from its otherwise tangential path. This path is an inward force – a centripetal force.

### What is constant in uniform circular motion?

Answer. In a uniform circular motion the direction of motion keeps on changing with the revolution. With the number of revolution displacement from the initial point to the final point also changes. As both these factors changes velocity also changes. But in that uniform circular motion what remains constant is speed.

### What force is needed to make an object move in a circle?

So for an object moving in a circle, there must be an inward force acting upon it in order to cause its inward acceleration. This is sometimes referred to as the centripetal force requirement. The word centripetal (not to be confused with the F-word centrifugal) means center seeking.

### Why is the moon accelerating?

Gravitational attraction provides the centripetal force needed to keep planets in orbit around the Sun and all types of satellite in orbit around the Earth. This means gravity makes the Moon accelerate all the time, even though its speed remains constant.

### Is it possible to have constant speed but still be accelerating?

Answer : Yes, a body can have a constant speed and still be accelerating. Acceleration can be either due to change in speed or due to direction of motion or both.

### Why does a satellite going around the Earth in a circular path does not work?

Satellites don’t fall from the sky because they are orbiting Earth. Even when satellites are thousands of miles away, Earth’s gravity still tugs on them. Gravity–combined with the satellite’s momentum from its launch into space–cause the satellite go into orbit above Earth, instead of falling back down to the ground.

### What is the centripetal force acting on a satellite in orbit?

The centripetal force required to keep the satellite in a circular orbit is mv2/r, where v is the orbital velocity of the satellite. The force of gravity that supplies this centripetal force is Gmem/r2, where me is the mass of the Earth (5.97370 × 1024 kg) and m is the mass of the satellite.

### How do satellites move around the earth?

A satellite orbits Earth when its speed is balanced by the pull of Earth’s gravity. Without this balance, the satellite would fly in a straight line off into space or fall back to Earth. Polar-orbiting satellites travel in a north-south direction from pole to pole.

### What provides the centripetal force when a planet orbits a star?

Gravitational attraction