Question
Fri October 28, 2011 By:

A car is being driven by a force of 2.5 x 10 raised to power 10 N.Traveling at a constant speed of 5m/s,it takes 2minutes to reach a certain place. Calculate the work done.

Expert Reply
Sat October 29, 2011

Given  v=5 m/s

F=2.5X1010 N

T= 2 min=120 sec

From equation of motion:

V=u +at

 5=0+a x120

(5/120)m/s2= a

And from :v2 –u2 =2as

    52-02=2x(5/120)xs

25=(10/120)s

S=300m

Work done= F. S

       W=2.5x1010x300

        =7.5x1012J

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