Finding time and final velocity

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SUMMARY

The problem involves a camera dropped from a helicopter ascending at 12.5 m/s from a height of 60.0 m. The correct calculations show that the time taken for the camera to reach the ground is 3.5 seconds, and its final velocity upon impact is 33.67 m/s. However, the initial velocity must account for the helicopter's ascent, making the initial velocity 12.5 m/s instead of 0 m/s. This adjustment is crucial for accurate results in projectile motion scenarios.

PREREQUISITES
  • Understanding of kinematic equations in physics
  • Knowledge of projectile motion concepts
  • Familiarity with acceleration due to gravity (9.8 m/s²)
  • Ability to differentiate between initial and final velocities in motion problems
NEXT STEPS
  • Study the kinematic equations for uniformly accelerated motion
  • Learn about the effects of initial velocity on projectile motion
  • Explore real-world applications of projectile motion in physics
  • Practice problems involving objects in free fall from moving platforms
USEFUL FOR

Students studying physics, educators teaching kinematics, and anyone interested in understanding the principles of motion and gravity in real-world scenarios.

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Homework Statement


A photographer in a helicopter ascending vertically at a constant rate of 12.5 m/s accidentally drops a camera out the window when the helicopter is 60.0 m above the ground.
-How long will it take the camera to reach the ground? What will its speed be when it hits?
a= -9.8 m/s^2 displacement=60 m

Homework Equations


(final v)^2=(initial v)^2 + 2*a*deltax
deltax=1/2a(t^2)+(initial v*t)



The Attempt at a Solution


initial v=0
so time will equal 3.5 s, and final velocity will equal 33.67 m/s^2
however, these are incorrect
 
Physics news on Phys.org
The initial v is not 0, but the v of the helicopter and photographer. If you don't believe is, look up some movies of a ball shot from a moving car: when the car is moving at 50 km/h and the ball is shot backwards at 50 km/h, it drops straight down.
 

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