v; = 20.0 m/s = 30.0° 45.0 m Figure 4.14 (Example 4.4) A stone is thrown from the top of a building.

Physics for Scientists and Engineers: Foundations and Connections
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Chapter3: Vectors
Section: Chapter Questions
Problem 71PQ: Vector F is proportional to vector A such that F=mA and m is a scalar. a. If A=2.4+3.0j and...
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A stone is thrown from the top of a building upward at an angle of 30.0° to the horizontal with an initial speed of 20.0 m/s as shown. The height from which the stone is thrown is 45.0 m above the ground.
(A) How long does it take the stone to reach the ground?                                (B) What is the speed of the stone just before it strikes the ground? 

v; = 20.0 m/s
= 30.0°
45.0 m
Figure 4.14 (Example 4.4) A
stone is thrown from the top
of a building.
Transcribed Image Text:v; = 20.0 m/s = 30.0° 45.0 m Figure 4.14 (Example 4.4) A stone is thrown from the top of a building.
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