As to where the equation for the critical speed comes from (if you are interested), consider the net force in circular motion. We know this is always **the centripetal force**, which points radially inward. The centripetal force causes centripetal acceleration and is necessary for the object to keep moving in a circle.

## What is always constant in object moving in circular path?

As mentioned earlier in Lesson 1, an object moving in uniform circular motion is moving in a circle with a uniform or constant speed. The **velocity vector** is constant in magnitude but changing in direction. … It is accelerating because the direction of the velocity vector is changing.

## What is constant in circular motion?

Since the body describes circular motion, its **distance from the axis of rotation remains constant at all times**. Though the body’s speed is constant, its velocity is not constant: velocity, a vector quantity, depends on both the body’s speed and its direction of travel.

### What remains constant uniform circular motion?

In a uniform circular motion, the direction of velocity is along a tangent drawn to the position of the particle on the circumference of a circle. … Hence **speed remains** constant in a uniform circular motion. So, the correct answer is “Option B”.

### What is the name of the force that keeps an object in circular path with constant acceleration?

**A centripetal force** is a net force that acts on an object to keep it moving along a circular path.

### Why is an object traveling in a circular motion accelerating?

An object undergoing uniform circular motion is moving with a constant speed. Nonetheless, it is **accelerating due to its change in direction**. The direction of the acceleration is inwards.

### How is centripetal force related to circular motion?

As an object moves in a circle, it is constantly changing its direction. … For objects in uniform circular motion, the net force and subsequent acceleration is directed inwards. Circular motion requires **a net inward** or “centripetal” force. Without a net centripetal force, an object cannot travel in circular motion.

### What force keeps an object moving?

**Inertia** is a force which keeps stationary objects at rest and moving objects in motion at constant velocity. Inertia is a force which brings all objects to a rest position. All objects have inertia. A more massive object has more inertia than a less massive object.

### What force keeps an object from reaching the ground?

**gravity**: The force of attraction which the earth exerts on objects on or near its surface, pulling them downwards.

### What keeps centripetal acceleration?

Velocity constantly changes direction, but not magnitude, when an object is in circular motion. … In the example shown here, **the string exerts a force on the ball** to keep it going in a circle — a force that provides the ball’s centripetal acceleration.

### What is work done by centripetal force on a body moving in circular path?

In circular motion, work done by centripetal force is **zero**.

### How do inertia and centripetal force combine to keep an object moving in circular motion?

How do inertia and centripetal force combine to keep an object moving in circular motion? … **Inertia acts toward the center of the circle to overcome centripetal force**, which acts away from the center. Centripetal force acts toward the center of the circle, and inertia keeps the object moving forward.

### What forces keep a roller coaster on the track?

A roller coaster is a machine that uses **gravity and inertia** to send a train of cars along a winding track. The combination of gravity and inertia, along with g-forces and centripetal acceleration give the body certain sensations as the coaster moves up, down, and around the track.

### What is circular motion is circular motion an acceleration motion?

Uniform circular motion is accelerated because the velocity changes due to continuous change in the direction of motion. … The change in velocity gives rise to an acceleration in the moving body. Therefore, circular motion is an acceleration motion even when the speed remains constant.

### Why does the object stay in motion without accelerating into the center?

It is **the inertia of your body** – the tendency to resist acceleration – that causes it to continue in its forward motion. While the car is accelerating inward, you continue in a straight line.

### What keeps the object moving in circular path answer?

Answer: **centrifugal force** is the force that keep the object on circular path and it acts towards the centre of the circle.

### What force is the centripetal force that keeps a car moving in a circular path?

The centripetal force causing the car to turn in a circular path is due to **friction between the tires and the road**. A minimum coefficient of friction is needed, or the car will move in a larger-radius curve and leave the roadway.

### What is the direction of motion of an object moving in a circular path changes at every point?

When an object moves in a circular path, the direction of motion of its trajectory **vector changes** at every point. This is because the velocity v is tangent to the circle at every point. Though the object seems to be moving in a circular path with constant speed the direction of velocity keeps changing at every point.

### Is kinetic energy constant in circular motion?

The kinetic energy in a **uniform circular motion is constant**. This is true because the speed in a uniform circular motion is constant and kinetic energy depends on the speed of the object as seen the equation of the kinetic energy.

### What changes continuously in circular motion?

**Velocity of the body** changes continuously in uniform circular motion. It is continually shifting its direction when an object travels around a circle.

### What remains constant in uniform circular motion and what changes continuously?

Complete answer:

(a)During a uniform circular motion an object describes **a circular path with a constant speed and its distance from the axis of rotation** remains constant. … An object describing a circular path changes its direction continuously due to which its velocity also changes.

### When a stone is tied to a string whirled in a circle?

When the string breaks, the centripetal force stops accting, Due to inertial, **the stone continues to move aling the tangent to circular path** . That is why the stone flies off tangentially to the circular path.