A particle initially located at the origin has an acceleration of a = 2 i+4 j m/s^2 and an initial velocity of v = 6 i - 2 j m/s find :
a- its speed and direction of motion at t=5 s
b- how far is it from the origin at t =5 s

Question

A particle initially located at the origin has an acceleration of a = 2 i+4 j m/s^2 and an initial velocity of v = 6 i - 2 j m/s find :
a- its speed and direction of motion at t=5 s
b- how far is it from the origin at t =5 s

unklerhaukus · Answer

is there supposed to be a $t$ in your equations?

anonymous · Answer

I do not know

parthkohli · Answer

Do you know the three equations of motion?

anonymous · Answer

yes

anonymous · Answer

I solve it (a) 
I need how can solve (b)

parthkohli · Answer

do you know its position at t = 5 sec?

anonymous · Answer

how can find it ?

anonymous · Answer

u know how to find distance travelled

parthkohli · Answer

$$\vec s = \vec u t + \frac{1}{2} \vec a t^2$$