A particle of mass 3 kg moves under a froce of `[4 hati + 8 hatj+ 10 hatk]` newton . Calcutale the acceleration (as vector) to which the particle is subjected. If the particle starts from rest and was at the origin initially. What are its new co - ordinates after 3 s?

Answer

12 km

Explanation

Deaceleration of train,
`a=|(v^(2)-u^(2))/(2s)|=(20xx20)/(2xx2)=100 km//hr^(2)`
Time to reach platform `=20/100=1/5` hr
`:.` Total distance travelled by the bird`=vt=60xx1/5=12 km`