[填空题]
A stunt driver wants to make h-rr i3o5 ice7aj9u3hqis car juv/.yt:rfeuoqi;mk;mnp+ 0n +mp over eight cars parked side by side below a horizontafnn0rm;:me+ot uv/; pqiy +k. l ramp
(a) With what minimum speed must he drive off the horizontal ramp? The vertical height of the ramp is 1.5 m above the cars, and the horizontal distance he must clear is 20 m . $m/s$
(b) If the ramp is now tilted upward, so that "takeoff angle" is $10^{\circ}$ above the horizontal, what is the new minimum speed? $m/s$
