Determine the length of the ramp, Physics

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A skateboard track has a horizontal segment followed by a ramp that declines at a 45° angle, as shown.

2091_physics.png

 

a) How long would the ramp need to be to give a landing for a skateboarder who launches from the horizontal segment at a velocity of 5.0 m/s?

b) If the initial velocity is doubled, what happens to the required length of the ramp?


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