A rock it thrown vertically upward with a speed of 200 m/s. When the rock returns, falls into hd 100 m deep, What is the rock's velocity as it hits the bottom of the hole
B. How long is the rock in the air, from the instant is released until it hits the bottom of the hole

PLEASE HELP thank you in advance!!

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped

Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.

Which of the following is the largest disadvantage of about half of the electricity in the united states comes from burning