What is the projectile's launch speed?

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SUMMARY

The discussion focuses on calculating projectile motion parameters, specifically the launch speed of a projectile. Key examples include a bullet fired horizontally at 1100 m/s and a baseball hit at 36.6 m/s at a 50-degree angle. The highest barrier cleared by a projectile launched at a 15-degree angle is 13.5 m, prompting the need to determine the launch speed required to achieve this height. The calculations involve understanding the physics of projectile motion, including time of flight and horizontal distance traveled.

PREREQUISITES
  • Understanding of projectile motion principles
  • Familiarity with kinematic equations
  • Knowledge of trigonometric functions
  • Basic physics concepts related to velocity and acceleration
NEXT STEPS
  • Study the kinematic equations for projectile motion
  • Learn how to resolve vectors into horizontal and vertical components
  • Explore the concept of maximum height in projectile motion
  • Investigate the effects of launch angle on projectile range and height
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Students in physics courses, educators teaching projectile motion, and anyone interested in understanding the dynamics of objects in motion.

Marcelgluch
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I though i was starting to understand but now i don't know anymore.. so please help! i have tried to figure it out myself .. but i just don't know where to start

1.A bullet is fired from a rifle that is held 1.6m above the ground in a horizontal position. The initial speed of the bullet is 1100 m/s. Find (a) the time it takes the for the bullet to strike the ground and (b) the horizontal distance traveled by the bullet.

2.A baseball is hit into the air at an initial speed of 36.6m/s and an angle of 50.0 degrees about the horizontal. at the same time, the center fielder starts running away from the batter, and he catches the ball 0.914 m above the level at which it was hit. if the center fielder is initially 1.10x10^2 from the plate, what must be his average speed?\

3.The highest barrier that a projectile can clear is 13.5 m, when the projectile is launched at an angle of 15.0 degrees above the horizontal. What is the projectile's launch speed?

i would appreciate any help at all... even if its just a hint on how to get started on these questions! thanks!
 
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