Answer :
The phone will hit the ground at a speed of 6.55 m/s. This is because the phone will accelerate due to gravity, which will increase its velocity until it hits the ground.
The acceleration due to gravity is 9.8 m/s^2. This means that the phone's velocity will increase by 9.8 m/s each second. If the phone is thrown down from a height of 1.57 m at a speed of 1 m/s, then it will take 0.16 seconds to reach the ground.
The calculation of the final velocity of the phone can be shown as follows:
Final Velocity = Initial Velocity + (Acceleration * Time)
= 1 m/s + (9.8 m/s^2 * 0.16 s)
= 6.55 m/s
To learn more about gravity click here: brainly.com/question/31321801
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