A 2 x 103kg car travels at a constant speed of 12 m/s around a circular curve of radius 30 m. What is the magnitude of the
centripetal acceleration in m/sof the car as it goes around the
curve?
a 0.4
b 3. 800
C 4.8
d 9600

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