Flag 9 grade science> a body in a straight line travels 2 m in ...
question mark

a body in a straight line travels 2 m in the first two seconds and 2.2m in the next four seconds with constant retardation. what will be its velocity at the end of the seventh second from the start?

Bhavya Agrawal , 11 Years ago
Grade 9
anser 1 Answers
Sunil Kumar FP
let the initial velocity be u
velocity at the end of second sth second=v1
velocity at the end of 6thsecond=v2
velocity at the end of the 7thsecond=v3
retardation=@
v1=u-2@
v2=u-6@
v3=u-7@
now
2=(u-2@)2-1/2@4
u-@=1
2.2=(u-2@)4-1/2@16
@=3/20
now v3=u-7@
=0.1m/s
thanks and regards
sunil kr
askIITian faculty
Last Activity: 11 Years ago
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments