A particle is moving along a horizontal line according to the formula where is the distance of the particle from the origin at a time (in seconds). What is the instantaneous velocity of the particle when ?
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A ball is moving along a horizontal line according to the formula where is the distance of the particle from the origin at a time (in seconds). When is the particle at rest?
The displacement (in feet) of a particle moving in a straight line is given by , where is measured in seconds. Find the instantaneous velocity when .
The position of a moving particle is defined by the function where the position is measured in meters, and the time is measured in seconds, . Find the instantaneous velocity and acceleration of that particle at .
where 
is the distance of the particle from the origin at a time 
(in seconds). When is the particle at rest? 
, where 
is measured in seconds. Find the instantaneous velocity when 
.
where the position 
is measured in meters, 
and the time is measured in seconds, 
. Find the instantaneous velocity and acceleration of that particle at 
.