Question

A particle moves along x-axis in such a way that its coordinate $x$ varies with time $t$ according ta the equation $x=2-5t$. The initial velocity of the particle is

• A. $-5m/s$
• B. $6m/s$
• C. $-3m/s$
• D. $3m/s$

Answer 1

The correct option is A $-5m/s$

The displacement-time equation is given by

$x=2-5t$

The initial velocity of the particle is

$v=\frac{dx}{dt}$

$v=\frac{d(2-5t)}{dt}=(0-5)m/s$

$v=-5m/s$

The correct option is A.