contestada

A stone fell from the top of a cliff into the ocean.
In the air, it had an average speed of 16 m/s. In the water, it had an average speed of 3 m/s before hitting
the seabed. The total distance from the top of the cliff to the seabed is 127 meters, and the stone's entire
fall took 12 seconds.

Respuesta :

emily000090

Answer:

down below

Step-by-step explanation:

total distance = sum of velocity * time for both legs of the journey;

let the time taken in air be t

hence time taken in water is 12-t

127 = 16*t + 3(12-t)

127 = 16t + 36 - 3t

127 - 36 = 16t - 3t

91 = 13t

t = 91/13 = 7 seconds

ence time taken in air = 7 seconds

time taken in water is 12 - 7 = 5 seconds

checking; 16*7 + 3*5 = 127 (proven

Otras preguntas