A car starts from rest and moves with constant acceleration and covera the distance between two point 180 m apart in 6 s. Itsspeed as it passes the second point is 45 ms^(-1) Find a. Its acceleration b. Its speed when it was at the point c. The distance from the first point when it was at rest.

A car starts from rest and moves with constant acceleration and covera

1.	A car starts from rest and moves with constant acceleration and covera the distance between two point 180 m apart in 6 s. Itsspeed as it passes the second point is 45 ms^(-1) Find a. Its acceleration b. Its speed when it was at the point c. The distance from the first point when it was at rest.
Answer» Solution :`V^(2)-u^(2) =2axx180 rArr 45^(2)-u^(2) =360 a` `v=u+at rArr 45=u+axx6` . Solve to get `u=15 m s^(-1)`, `a= 5 m s^(-2)` `u^(2)=0^(2)+2ax rArr 15^(2)=0^(2) + 2 xx5x rArr `x=22.5 m`.