The range of a projectile fired at an angle ? with the horizontal and with an initial velocity of  v0  feet per second is r =  1 32v02 sin(2?) where r is the horizontal distance (in feet) the projectile travels. An athlete throws a javelin at 75 feet per second. At what angle must the athlete throw the javelin so that the javelin travels 145 feet? (Assume ? < 45°. Round your answer to two decimal places.)

Principles of Physics: A Calculus-Based Text
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Chapter1: Introduction And Vectors
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The range of a projectile fired at an angle ? with the horizontal and with an initial velocity of 

v0

 feet per second is

r = 
1
32
v02 sin(2?)

where r is the horizontal distance (in feet) the projectile travels. An athlete throws a javelin at 75 feet per second. At what angle must the athlete throw the javelin so that the javelin travels 145 feet? (Assume ? < 45°. Round your answer to two decimal places.)
? =  °

The range of a projectile fired at an angle 0 with the horizontal and with an initial velocity of vo feet per second is
r =
32
글02 sin(28)
where r is the horizontal distance (in feet) the projectile travels. An athlete throws a javelin at 75 feet per second. At what angle must the athlete throw the javelin so that the javelin travels 145 feet? (Assume
0 < 45°. Round your answer to two decimal places.)
Transcribed Image Text:The range of a projectile fired at an angle 0 with the horizontal and with an initial velocity of vo feet per second is r = 32 글02 sin(28) where r is the horizontal distance (in feet) the projectile travels. An athlete throws a javelin at 75 feet per second. At what angle must the athlete throw the javelin so that the javelin travels 145 feet? (Assume 0 < 45°. Round your answer to two decimal places.)
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