You stand at the top f a tall building with a stopwatch. you drop a rock off the side of the building, and it takes the rock 1.9 seconds to hit the ground (assume no time resistance)

a. how tall is the building?

b. how fast was the rock going when it hit the ground?

c. when you did your calculation for part (b), you assumed there was no air resistance. would your answer be larger, smaller, or the same if there were air resistance? explain.

a) h=1/2*gt^2=1/2*9.8*1.9^2=17.69 m

b) v=gt=18.62 m/s

c) Due to the air resistance (also called 'drag force') the speed would decrease since the net force (difference between force of gravity and drag force that attracts the body to the earth) becomes smaller.

the cellphone, they would then know if the killer would have contacted them or always hated them. or if it was a breakup. but if that is not the case, then it would be the clothing. to put in a bullet, it would have to be put in by hands. hands have finger prints which, would have giving you the answer of who done it.

explanation: