Answer to Question #349442 in Physics for JMC

Question #349442

a cars velocity decreases uniformly 20 m/s to 6m/s while covering 70m distance in a straight line. Find its acceleration and time taken to the travel distance



1
Expert's answer
2022-06-09T09:59:14-0400

Given:

vi=20m/sv_i=20\:\rm m/s

vf=6m/sv_f=6\:\rm m/s

d=70md=70\:\rm m



d=vf2vi22ad=\frac{v_f^2-v_i^2}{2a}

a=vf2vi22d=62202270=2.6m/s2a=\frac{v_f^2-v_i^2}{2d}=\frac{6^2-20^2}{2*70}=-2.6\:\rm m/s^2


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