# A particle of mass 2 kg moves on a circular path with a constant speed of 10mm/s find the change in speed and magnitude of change in velocity when the particle completes a half revolution.

By Ritesh|Updated : November 12th, 2022

The change in speed and magnitude of change in velocity when the particle completes half revolution 20 m/s. The speed of the particles doesn't change. There will be no change in speed, 0 m/sec. However, the velocity vector has changed.

The starting and final velocities are equal in magnitude but move in opposing directions. The direction of the tangent at a given place determines the velocities there. the two velocities will be in opposition when it completes half of its revolution).

Therefore, the velocity change will be 20 m/sec in magnitude.

ie, change in velocity= V - (-V) =10 - (-10)=20

### Speed and Velocity

• Most of us find speed and velocity to be a little puzzling.
• The distinction between speed and velocity is that the former tells us how rapidly an object is traveling, while the latter also tells us the direction in which the body is going.
• While velocity is a function of displacement, speed can be defined as a function of the distance traveled.
• The speed of a body at any particular moment is known as its instantaneous velocity.
• The formula for calculating average velocity is v = x/t, where x is the body's total displacement and t represents the passage of time.
• Because the distance traveled might be greater than the displacement but never greater than the displacement, the average velocity is always lower than or equal to the average speed.

Summary:

## A particle of mass 2 kg moves on a circular path with a constant speed of 10mm/s find the change in speed and magnitude of change in velocity when the particle completes a half revolution.

A particle of mass 2 kg moves on a circular path with a constant speed of 10mm/s. The change in speed and magnitude of change in velocity when the particle completes half revolution 20 m/s.