Kayaks have been used for thousands of years to hunt and fish in Arctic regions.

The total volume of a particular kayak is

285 litres (which is 0.285 m3). It has a mass of

75 kg. The man using it has a volume of

0.066 m3. When sitting in the kayak, half of

man’s volume is inside the kayak. The density

of the human body is about 1000 kg/m3.

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