A long-jumper leaves the ground at an angle of 20° to the horizontal and at a speed of 11 m/s. (a) How far does he jump? (b) The maximum height reached?

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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Example 2.14
A long-jumper leaves the ground at an angle of 20° to the horizontal
and at a speed of 11 m/s. (a) How far does he jump? (b) The
maximum height reached?
Sol
Transcribed Image Text:Example 2.14 A long-jumper leaves the ground at an angle of 20° to the horizontal and at a speed of 11 m/s. (a) How far does he jump? (b) The maximum height reached? Sol
r = Vx²+y? = 1.29 m
The component of velocity are
Vx = Vo = 5 m/s
Vy = -g t = -2.45 m/s²
The resultant velocity is given by
v =
= 5.57 m/s
The angle 0 is given by
-1
e = tan
-26.1°
Example 2.16
An object is thrown horizontally with a velocity of 10m/s from the top
of a 20m high building as shown in Figure 2.7. Where does the object
strike the ground?
10m/s
Solution
Consider the vertical motion
Vyo = 0
20m
ay = 9.8 m/s?
Transcribed Image Text:r = Vx²+y? = 1.29 m The component of velocity are Vx = Vo = 5 m/s Vy = -g t = -2.45 m/s² The resultant velocity is given by v = = 5.57 m/s The angle 0 is given by -1 e = tan -26.1° Example 2.16 An object is thrown horizontally with a velocity of 10m/s from the top of a 20m high building as shown in Figure 2.7. Where does the object strike the ground? 10m/s Solution Consider the vertical motion Vyo = 0 20m ay = 9.8 m/s?
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