A stone thrown from the top of a building is given an initial velocity of 25 m/s straight upward. The building is 70 m high, and the stone just misses the edge of the roof on its way down, as shown in Figure (1). Using t=0 as the time the stone leaves the thrower's hand at position A, determine: (A) The time at which the stone reaches its maximum height, (B) The maximum height, (C) The time at which the stone returns to the height from which it was thrown, (D) The velocity of the stone at this instant, and 70 m (E) The velocity and position of the stone at t= 5 s. Figure (1): Position and velocity versus time for a freely falling stone thrown initially upward with a velocity Vyi=25.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A stone thrown from the top of a building is given an initial velocity of 25 m/s straight
upward. The building is 70 m high, and the stone just misses the edge of the roof on its way
down, as shown in Figure (1). Using t=0 as the time the stone leaves the thrower's hand at
position A, determine:
(A) The time at which the stone reaches its maximum height,
(B) The maximum height,
(C) The time at which the stone returns to the height from which it was thrown,
(D) The velocity of the stone at this instant, and
70 m
(E) The velocity and position of the stone at t= 5 s.
Figure (1): Position and velocity versus
time for a freely falling stone thrown
initially upward with a velocity Vyi=25.
Transcribed Image Text:A stone thrown from the top of a building is given an initial velocity of 25 m/s straight upward. The building is 70 m high, and the stone just misses the edge of the roof on its way down, as shown in Figure (1). Using t=0 as the time the stone leaves the thrower's hand at position A, determine: (A) The time at which the stone reaches its maximum height, (B) The maximum height, (C) The time at which the stone returns to the height from which it was thrown, (D) The velocity of the stone at this instant, and 70 m (E) The velocity and position of the stone at t= 5 s. Figure (1): Position and velocity versus time for a freely falling stone thrown initially upward with a velocity Vyi=25.
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