Exercise 1 a geologist at the top of a 100-meter-deep crevasse cannot resist the temptation to hurl a gneiss rock down to the bottom The rock has an initial downward speed of 100m/s as it leaves the geologists hand when t=0s. Find a. The time interval during which the particle is in flight called the time of flight: and b The speed of the particle at the instant just before impact R.P96 Exercise 2 A rocket is launched from rest from an underwater base a distance of 125m below the surface of a body of water It moves vertically upward with an unknown but assumed constant acceleration. and it reaches the surface in a time of 2.15s when it breaks the surface its engines automatically shut off and it continues to rise What maximum height does it reach? (H.P29)10 Exercise 1 A geologist at the top of a 100-meter-deep crevasse cannot resist the temptation to hurl a gneiss rock down to the bottom. The rock has an initial downward speed of 10.0m/s as it leaves the geologist’s hand when t =0s. Find a. The time interval during which the particle is in flight, called the time of flight; and b. The speed of the particle at the instant just before impact. R. P96 A rocket is launched from rest from an underwater base a distance of 125m below the surface of a body of water. It moves vertically upward with an unknown but assumed constant acceleration , and it reaches the surface in a time of 2.15s. When it breaks the surface its engines automatically shut off and it continues to rise. What maximum height does it reach? Exercise 2 (H. P29)