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Question

in two systems of units the relation between velocity , acceleration and force is v2 = (v1 e2 ) / c , a2 = a1ec and F2 = (F1 ) / ec where e and c are constants . what is the relation between mass ,length and time in the two systems

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Solution

First of all,
F2=F1ecm2a2=m1a1ecm2a1ec=m1a1ecm2=m1ec2
Again,
a2=a1ecdv2dt2=dv1dt1ecdt2dt1=1ecdv2dv1
Now
v2=v1e2cdv2dv1=e2c
so,
dt2dt1=1ece2c=ec2t2=ec2t1+t0
t0 is a constant.
Now
v2=v1e2cdl2dt2=e2cdl1dt1dl2=e2cdt2dt1dl1dl2=e2cec2dl1=e3c3dl1l2=e3c3l1+l0
l0 is a constant.

The answer is
m2=m1ec2l2=e3c3l1+l0t2=ec2t1+t0


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