Can an object move in a circular path without being accelerated?

A train is moving with a constant speed on a straight portion of track. Then, it encounters a curve in the tracks, and goes along the curve. However, it does not change the magnitude of acceleration during its time on the curve.

What is the role of centripetal acceleration during circular motion?

centripetal acceleration, the acceleration of a body traversing a circular path. Because velocity is a vector quantity (that is, it has both a magnitude, the speed, and a direction), when a body travels on a circular path, its direction constantly changes and thus its velocity changes, producing an acceleration.

What remain constant in a 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”.

Is centripetal acceleration a constant?

Since velocity and radius are constants for a given uniform circular motion, so the magnitude of centripetal acceleration is also always constant. But, the direction of centripetal acceleration changes continuously in the circular path. So, centripetal acceleration is not a constant vector.

Does acceleration change in 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.

Does centripetal acceleration remain constant?

The change in direction is accounted by radial acceleration ( centripetal acceleration ), which is given by following relation: ar=v2r a r = v 2 r . This means that the centripetal acceleration is not constant, as is the case with uniform circular motion. The greater the speed, the greater the radial acceleration.

Can centripetal acceleration change the speed of circular motion explain?

In a uniform circular motion, the speed of of the body remains the same along the path. But the velocity of the body changes from one point to another in the path because of the change in direction of its motion. Therefore, centripetal acceleration cannot change the magnitude of velocity or speed of circular motion.

Which of the following is not 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.

Which of the following quantities does not remain constant in uniform circular motion?

When a body is in a uniform circular motion, its speed remains constant but its velocity, angular acceleration, angular velocity change due to a change in its direction.

Does acceleration change in uniform circular motion?

Just as you said in the question, the direction of acceleration is changing in uniform circular motion. Therefore acceleration is variable, as a vector quantity is said to be variable if either its magnitude or its direction is changing.