The Horizontal Distance x and The Vertical Height y of A Projectile At A Time tare Given By                         Where a, b and c are Constants. What Is The Magnitude Of The Velocity Of The Projectile 1 Second After It Is Fired?

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Question

 

The horizontal distance x and the vertical height y of a projectile at a time tare given by

                       

Where ab and c are constants. What is the magnitude of the velocity of the projectile 1 second after it is fired?

Solution

Correct option is

 

The horizontal component of velocity is 

                   

The vertical component of velocity is  

                   

The value of vy at t = 1 s is (2b + c). Therefore, the magnitude of velocity at t = 1 s is  

                   

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