# Question #5ced9

##### 2 Answers

(a) 0.6 s

(b) 1.2 s

#### Explanation:

As the fish falls with constant acceleration i.e

(a)

According to question,

(b)

According to question,

a)

b)

#### Explanation:

Speed is the magnitude of velocity. The fish will continue to have its horizontal speed at 6.0 m/s. Speed will be the sum of its increasing vertical speed and its constant horizontal speed.

Its increasing vertical velocity will be a*t downward. So its velocity, will be the vector sum of its vertical and horizontal velocities. Its speed can be found using Pythagoras

a) We want the time at which the speed is 12 m/s, so

Using 9.8 m/s^2 as the value of a,

b) We now want the time at which the speed is 24 m/s, so

Using 9.8 m/s^2 as the value of a,