A stone is thrown upward at angle of 32o with a speed of 25 m/s from the top of a 50-m high building. (a) How long does it take the stone to reach the ground? (b) What is the speed of the stone just before it hits the ground?

University Physics Volume 1
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ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter3: Motion Along A Straight Line
Section: Chapter Questions
Problem 72P: (a) Calculate the height of a cliff if it takes 2.35 s for a rock to hit the ground when it is...
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Qb. . A stone is thrown upward at angle of 32o with a speed of 25 m/s from the
top of a 50-m high building. (a) How long does it take the stone to reach
the ground? (b) What is the speed of the stone just before it hits the
ground?
Qc.  Suppose the position of a particle is given as a function of time by r(t) =
x(t)i + y(t)j, with x(t) = at + b and y(t) = ct2 + d, where a = 1 m/s, b = 1 m,
c = 0.225 m/s2
, and d = 1 m. (a) Calculate the average velocity during the
time interval from t = 2 s to t = 5 s. (b) Determine the velocity and the
speed at t = 3 s.

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