A body of mass 5 kg starts from the origin with an initial velocity of vecU=(30i+40j)m//s.A constant force of F=(-hati-5hatj)Nact on the body . Find the time in which the y-component of the velocity become zero .

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

1.	A body of mass 5 kg starts from the origin with an initial velocity of vecU=(30i+40j)m//s.A constant force of F=(-hati-5hatj)Nact on the body . Find the time in which the y-component of the velocity become zero .
Answer» SOLUTION :`vecu=30i+40j`….(1) `u=u_(X)hati+u_(y)hatj`….(2) `F=-hati-5hatj `….(3) `F=F_(x)hati+F_(y)hatj`….(4) comparing (1) and(2),(3)and (4) we have `u_(y)=40 m//s, F_(y)=-5N` `F_(y)=ma_(y),``a_(y)=-1m//s^(2)` `v_(y)=u_(y)+a_(y)xxt,0=40-1xxt,t=40sec`