Car A starts out traveling at 35.0 km/h and accelerates at 25.0 km/h2 for 15.0 min. Car B starts out traveling at 45.0 km/h and accelerates at 15.0 km/h2 for 20.0 min. Car C starts out traveling at 32.0 km/h and accelerates at 40.0 km/h2 for 30.0 min. Car D starts out traveling at 110.0 km/h and decelerates at 60.0 km/h2 for 45.0 min. Which car's final speed was closest to 15 m/s?

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s