Vertical Motion and Free Fall Video Lessons

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Problem: 5. A ball is thrown 125 meters upward and then falls the same distance back to Earth. Neglecting air resistance, its total time in the air isA) about 10 seconds. B) about 15 seconds. C)  about 5 seconds. D) more than 20 seconds. 

FREE Expert Solution

5. 

From the kinematic equations:

Δy = v0t + (1/2)gt2

125 = 0 + (1/2)(9.81)t2 

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Problem Details

5. A ball is thrown 125 meters upward and then falls the same distance back to Earth. Neglecting air resistance, its total time in the air is

A) about 10 seconds. 

B) about 15 seconds. 

C)  about 5 seconds. 

D) more than 20 seconds. 

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Based on our data, we think this problem is relevant for Professor Eckhause's class at UMICH.