Explain that a body can have zero average velocity but non zero average speed. (2024)

FAQs

Explain that a body can have zero average velocity but non zero average speed.? ›

Example: If a body starts its motion from a point and comes back to the same point after a certain time, the displacement is zero, the average velocity is also zero, but the total distance traveled is not zero and therefore, the average speed is not zero.

Since distance is also a scalar quantity and it wont be negative if we moves in opposite direction. It always adding irrespective of direction.So total distance travelled of a moving body can not be zero. So total average speed also cannot be zero and it will be nonzero if body is moving..

If we consider a body in motion having the same initial and final point, its displacement is zero while the distance covered is not zero. Therefore it has zero velocity and a non-zero speed.

Yes . The average velocity depends on the net displacement of a body so if a body starts from a position and comes back to same position after some time , the net displacement is zero .

If the question would be, "Can you have a zero velocity and nonzero acceleration?" my answer would be yes. An example would be a ball thrown upward. At the highest point, the velocity is zero and instantaneous acceleration is -9.8 m/s2.

Answer- Yes we can have! Suppose we are moving in a straight road, with constant speed and no change in direction, then our velocity is not zero, but acceleration is zero, because as there is no change in velocity.

Motion of a boy from his home to shop in one direction and back to home in its reverse direction is an example of a situation in which a body has a certain average speed but its average velocity is zero.

It is possible that the acceleration of a particle is non-zero and velocity is zero at the same instant. For example, if a ball is thrown up then at the highest point, velocity is zero but the acceleration is non-zero.

No. Velocity is a vector, and speed is its magnitude. If speed is nonzero, then velocity has a nonzero magnitude, and is therefore not a zero vector.

Average velocity is defined as the ratio of total displacement to total time taken. Thus, in case when the final position and initial position is same the total displacement will be zero and thus average velocity will also be zero even if the average speed is not zero.

How can an object have a velocity of zero and a non-zero acceleration? ›

Flexi Says: An object can have a velocity of zero but still have an acceleration. For example, take a ball that has been thrown into the air. At the moment the ball has reached its highest location, the ball has zero velocity. Nonetheless, its direction is changing, which means it has a changing (non-zero) acceleration.

The average speed depends on the total distance traveled which is non-zero in this case. On the other hand, the average velocity depends on the total displacement of the body. In the case of a round trip, the total displacement is zero. Hence, the average velocity will be zero.

Answer and Explanation:

Yes, one can have zero displacement and a nonzero average velocity as well as zero displacement and nonzero velocity. Displacement of the ball is clearly zero.

If the average speed of an object is zero, then its average velocity must be zero; but if its average velocity is zero, its average speed is not necessarily zero. The acceleration is always the slope of the "velocity versus time" graph and the velocity is always the slope of the "position versus time" graph.

Explanation: Zero displacement and nonzero average velocity can occur when an object moves back and forth over a certain distance and returns to its original position, but with a change in time.

If an object is moving, then distance travelled will be greater than zero . Hence average speed is greater than zero. In the motion of an object displacement can be zero if starting point and ending point are same. For example moving on a circular track so that starting point and ending point is same.

If speed is zero, then its velocity must also be zero. If average velocity is zero, then its average speed need not be zero. If speed is constant, then its velocity must also be constant.