8. A motorbike is ridden up the left side of a symmetrical ramp. The bike reaches the top of the ramp at speed u, becomes airborne and falls to a point ? on the other side of the ramp.
In terms of \( u \), land \( g \), obtain expressions for:
(a) the time t for which the motorbike is in the air
(2)
(b) the distance \( \mathrm{OP}(=[) \) along the right side of the ramp.
(3)
(Total 5 marks)