A car is moving along a straight horizontal road with constant acceleration \(a \mathrm {~m} \mathrm {~s} ^ { - 2 } ( a > 0 )\). At time \(t = 0\) the car passes the point \(P\) moving with speed \(u \mathrm {~m} \mathrm {~s} ^ { - 1 }\). In the next 4 s , the car travels 76 m and then in the following 6 s it travels a further 219 m .