Reverend Northwick climbs to the church belfry one morning to determine the height of the church. From an outside balcony he drops a book and observes that it takes 2.00 s to strike the ground below, How high is the balcony of the church belfry?

20 m

Explanation:

Given that,

A book taken 2 s to strike the ground below.

We need to find how high is the balcony of the church. Let is assume that the book was at rest initially.

Using second equation of motion as follows :

Hence, the balcony of the church is at a height of 20 m.

not too sure thinking all accelerations are pointed down