A body of mass 5kg starts from the origin with an initial velocityof barU= (30i+40j)m//s. A constant force of F= (-hati - 5 hatj)N acts on the body . Find the time in which they- component of the velocity becomes zero .

A body of mass 5kg starts from the origin with an initial velocityof b

1.	A body of mass 5kg starts from the origin with an initial velocityof barU= (30i+40j)m//s. A constant force of F= (-hati - 5 hatj)N acts on the body . Find the time in which they- component of the velocity becomes zero .
Answer» <html><body><p></p>Solution :`baru= 30i + 40 j` ....... (1) <br/> ` u=u_(x) <a href="https://interviewquestions.tuteehub.com/tag/hati-2693493" style="font-weight:bold;" target="_blank" title="Click to know more about HATI">HATI</a> + u_(y) hatj`........ (2)<br/>`F= - hati - 5hatj` ........ (3) <br/> ` F= F_(x) hati + F_yhatj` ........ (4) <br/> comparing (1) and (2), (3) and (4) <br/> we have <br/> `u_y = 40 m//s , F_y =-5N` <br/> `F_y = ma_y , a_y = -1 m//s^(2)` <br/> `v_y = u_y + a_y xx 1 , <a href="https://interviewquestions.tuteehub.com/tag/0-251616" style="font-weight:bold;" target="_blank" title="Click to know more about 0">0</a> = 40 -1 xx t , t = 40` sec</body></html>