How far will a brick starting from rest fall freely in 3 seconds

The brick will cover a distance of .

Explanation:

Given: A brick starting from rest fall freely in 3 seconds.

As mentioned in question,

When an object falls freely then its initial speed will be .

Acceleration due to gravity is .

Time

Using the laws of motion:

Substiuting all the values we get:

Therefore, the brick will cover a distance of .

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When object falls freely we can say

its initial speed will be ZERO

and its acceleration due to gravity must be

Now we need to find the distance of free fall in 3 s of time

So here we will use kinematics

now we will plug in all values in it

So it will fall by total distance of 44.1 m

the correct choice is a .

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the total distance traveled by the car is

30km + 49km = 79 km .