A model rocket accelerates upward from the ground with a constant acceleration, reaching a height of 50 m in 8 s. What is the speed (in m/s) at a height of 50 m?A: 1.07×101 B: 1.25×101 C: 1.46×101 D: 1.71×101 E: 2.00×101

The  value is  

Explanation:

From the question we are told that

    The  height is  

    The  time taken is  

From the equation of motion we have  that

Here u = 0  because the rocket started at rest

=>  

=>    

Also from the kinematic equation we have that

=>  

=>  

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