Question

An object starts from rest and moving with constant acceleration (2i - j) m/s2. The position after 4 seconds, starting from origin​

Answer 1

Explanation:

Here, y component of acceleration as well as initial velocity is zero.

So, the y coordinate of the particle will remain constant.

Now , acceleration along x direction = 4

i

^

Applying second equation of motion along x direction :

Initial velocity = 0

s =

2

1

at

2

= 18

i

^

Let initial x coordinate be p

p+18 =7

p = −11

Hence , the initial position of the object is −11

i

^

+4

j

^

.

Answer 2

Answer's in the pic.........