1.

An object starting from rest travels 20m in first 2secs and 160m in next 4secs. What will be its velocity after 7secs from start.

Answer»

as the body STARTED from rest then tavelled upto 2 secs THEREFORE;

d=20m in 0-2secs

then the body TRAVELLED 160 m in next 4 secs therefore ;

d=160 in 2-6secs

total d=( 160+20)m=180m

total t= 6secs

so,VELOCITY after 7secs from start is 180m/6secs=30m/s




hope it helps!! :)




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