i have some physics questions. please give me correct answers. thank you Questio

Question

i have some physics questions. please give me correct answers. thank you

Question: In a galaxy far, far away, a ball is dropped from a height of 211 m onto a planet. The acceleration due to gravity on the planet is 6.08 m/s2 and the planet has no atmosphere, so air resistance is negligible. Part 1) Write an expression to describe how the velocity of the ball changes with time as it falls. Assume it is dropped from rest att 0 s. Define the surface of the planet as y 0 and the initial height of the ball 30-211 m. j m/s Part 2) Write an expression for the displacement of the ball as it falls. J m Part 3) How long is the ball in free fall for?

Explanation / Answer

We have equation of motion(kinematics)

V=U+a*t. Where a is acceleration, 't" is time .,U is initial velocity

Y=U*t + 1/2 a t2.

1) Vy = 6.08 t

2)y=1/2 ×6.08×t2 =3.04*t2

3)Time of free fall T=ropt(2h/a)=root(211÷3.04)

T=8.33 sec.

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