Problem 9A rock is thrown off of the edge of a 120 meter tall cliff with an initial speed of 25 m/s atan angle of 35 degrees above the horizontal. Ignore air resistancea) How much time elapses (in units of seconds) between the moment the rockis thrown and the moment the rock lands on the ground below?b) How far does the rock travel (in units of meters) in the horizontal directionbefore landing?c) How fast is the rock moving (in m/s) just before it hits the ground?d) What direction is the rock moving in just before it hits the ground (in terms ofan angle below the horizontal)?

Name: Problem 9A rock is thrown off of the edge of a 120 meter tall cliff w
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Description: Problem 9A rock is thrown off of the edge of a 120 meter tall cliff with an initial speed of 25 m/s atan angle of 35 degrees above the horizontal. Ignore air resistancea) How much time elapses (in units of seconds) between the moment the rockis thro

When an object is obliquely near the earth's surface, it moves in a curved path. The object is…

Answered: Problem 9 A rock is thrown off of the…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Problem 9
A rock is thrown off of the edge of a 120 meter tall cliff with an initial speed of 25 m/s at
an angle of 35 degrees above the horizontal. Ignore air resistance
a) How much time elapses (in units of seconds) between the moment the rock
is thrown and the moment the rock lands on the ground below?
b) How far does the rock travel (in units of meters) in the horizontal direction
before landing?
c) How fast is the rock moving (in m/s) just before it hits the ground?
d) What direction is the rock moving in just before it hits the ground (in terms of
an angle below the horizontal)?

Expert Solution

Step 1

When an object is obliquely near the earth's surface, it moves in a curved path. The object is called the projectile and the path of its motion is called as projectile motion. The acceleration of the object is almost constant throughout its motion and is equal to the acceleration due to gravity, g.
x and y-axis motion of the object is independent of each other.
kinematic equation of motion in vertical direction-
$y = y_{0} + v_{0 y} t - \frac{1}{2} {gt}^{2} where, y_{0} is initial position y is final position v_{0 y} is initial speed in y direction t is time$

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