Question

A particle is constrained to move along a straight line. The graph in the adjoining figure shows the distance $s$ moved by the particle in time $t$, measured from the starting time. The shape of the curve indicates that

• A. Acceleration of the particle is increasing at $X$
• B. The speed of the particle is maximum at the point $Z$
• C. The speed of the particle $X$ is greater than that $Z$
• D. The particle is at rest at the point $Y$

Answer 1

Answer: (D)

The particle is at rest at the point $Y$

We know that $V=\frac{ds}{dt}$ ,now at point Y the slope is zero ,means ds=0. So at point velocity is 0