The starting velocity was 0 m/s, and the final velocity was -15.35 m/s. Based on this, what was the average

velocity of the rock? In general, to find the average of

any 2 things, you add them together and divide by how

many things there are.

The average velocity is -7.675 m/s

Explanation:

Given;

initial velocity, u = 0 m/s

final velocity, v = -15.35 m/s

Based on the follow up state " In general, to find the average of any 2 things, you add them together and divide by how many things there are", the average velocity will be calculate as ;

Sum of the velocities = 0 m/s + (-15.35 m/s) = -15.35 m/s

Number of velocites = 2

AVERAGE VELOCITY = (-15.35 m/s) / (2)

AVERAGE VELOCITY = -7.675 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s

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