A cart moves along a track at a velocity of 3. 5 cm/s. When a force is applied to the cart, its velocity increases to 8. 2 cm/s. If it takes the cart 1. 5 seconds to reach 8. 2 cm/s, what is the acceleration of the cart? Round your answer to the nearest tenth. Cm/s2.

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