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yoyo16
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Homework Statement
Dave and Andrew are racing. Dave running at a constant speed of 20m/s is passed by Andrew. 2.0s after Andrew passes, Dave accelerates at 1.0m/s^2 until he catches up with Andrew 25s later. What is Andrew's velocity (he does not accelerate)?
Homework Equations
Kinematics Formulas.
The Attempt at a Solution
d=vit+1/2at^2
=(20)(25)+1/2(1)(25)^2
=812.5
Dave travels 812.5m.
v=d/t
=(812.5)(25+2)
=30.7m/s
I'm not sure if the way I did it was correct. Can someone please tell me how to do it. If you think I'm right though can you please tell me. Thanks!