Question #afec9

1 Answer
Dec 1, 2016

Answer:

#-0.75ms^-2#

negative value indicates slowing down or deceleration or retardation.

Explanation:

Kinematic equation connecting values of interest is
#v=u+at#
where #u and v# are the initial and final velocities respectively, #a# is acceleration and #t# is time taken for the change. It is assumed that we are dealing with constant acceleration.

Inserting given values we get
#15=24+axx12#
Rearranging and Solving for #a# we get
#12a=15-24#
#=>a=-cancel9^3/cancel12_4#
#=>a=-0.75ms^-2#

As expected negative value indicates slowing down or deceleration or retardation.