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# When a body is projected from the ground with an initial velocity'u'with a certain angle with respect to the ground, the magnitude of change in velocity from t=0 to t=0 secs is:

Grade:12th Pass

## 2 Answers

vikas askiitian expert
509 Points
10 years ago

initial velocity = Vi = ucos@ (i) + usin@j

after t time ,

(vertical comp of velocity ) Vy = (usin@-gt) (j)

horizontal component remains same ..

Vx = ucos@

final velocity (Vf) = (ucos@) (i) + (usin@-gt) (j)

change in velocity = Vi- Vf = dV = gt (j)

dV = gt  (change in velocity after time t)

approve if u like this ans

SAGAR SINGH - IIT DELHI
879 Points
10 years ago

Dear student,

Horizontal component of velocity remains same...

So, Vx = ucos@

final velocity (Vf) = (ucos@) (i) + (usin@-gt) (j)

change in velocity = Vi- Vf = dV = gt (j)

dV = gt  (change in velocity after time t)

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Sagar Singh

B.Tech, IIT Delhi

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