Question

A particle moving with initial velocity of 5m/s is subjected to a uniform accelaration of -2.5m/s^2. Find displacement in next 4 secounds.

Answer 1

Initial velocity = 5 m/s
acceleration = -2.5 m/s²
$s=ut+ \frac{1}{2}a t^{2} \\ s=5(4)+ \frac{1}{2}(-2.5)( 4^{2}) \\ s=20+(-20) \\ s=0$
Displacement in next 4 seconds = 0

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