PhysicsBowl 2016 Q6

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PhysicsBowl 2016

6) We have an object thrown downward, and our goal is to find the initial height. Let's first draw out the situation.

Where a is acceleration, t is time, v is velocity, d is distance

Looking at the kinematic equations we can determine which one best suits the situation.

Where d is height, v is velocity, t is time, and a is acceleration

We already know the initial velocity, acceleration, time interval, and the final height, so we will use the red equation to solve for the initial height.

Where d is height, v is velocity, a is acceleration, g is acceleration due to gravity, and t is time

Answer: D