A body in one-dimensional motion has zero spe | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The magnitude of velocity is defined as speed.Mathematically,$v = |\vec{v}|$,where $v$ is speed and $\vec{v}$ is velocity.If the speed $v = 0$ at

Vedclass · Accepted Answer

Zero velocity

Vedclass · Answer

(A) The magnitude of velocity is defined as speed.Mathematically,$v = |\vec{v}|$,where $v$ is speed and $\vec{v}$ is velocity.If the speed $v = 0$ at an instant,then the magnitude of the velocity must also be zero.Therefore,the velocity $\vec{v}$ must be zero at that instant.Note that the acceleration does not necessarily have to be zero; for example,a ball thrown vertically upward has zero velocity and zero speed at its highest point,but it still experiences a constant acceleration due to gravity $(g = 9.8 \ m/s^2)$.

$A$ body in one-dimensional motion has zero speed at an instant. At that instant,it must have:

Similar Questions

The displacement of a particle,moving in a straight line,is given by $s = 2t^2 + 2t + 4$,where $s$ is in metres and $t$ is in seconds. The acceleration of the particle is ........ $m/s^2$.

Will the acceleration increase or decrease with an increase in velocity?

The displacement equation for a particle is $s = 3t^3 + 7t^2 + 14t + 8 \ m$. Its acceleration at time $t = 1 \ s$ is ....... $m/s^2$.

What is retardation?

$A$ particle is moving in a straight line such that its velocity is increasing at $5\,m/s$ per meter. The acceleration of the particle is .......... $m/s^2$ at a point where its velocity is $20\,m/s$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module