7. A baseball player runs from home plate to first base, a distance of 90 feet.

Physics
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7. A baseball player runs from home plate to first base, a distance of 90 feet.The graph shows the displacement of the player over time. https://tcan4424-oakcliff-ccl.gradpoint.com/Resour...

What is the approximate average speed of the player's run to first base?

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8. Over a span of 6.0 seconds, a car changes its speed from 89 km/h to 37 km/h. What is its average acceleration in meters per second squared (m/s2)?

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May 17th, 2015

7. The average speed ran by the player is : Distance/time taken

 =90ft/4.7 seconds

=19.14 ft/second

8. Acceleration is change of speed/time

=37km/h-89km/h / 6 seconds

=-52km/h /6 sec

=(-52000m/3600sec)/6 seconds

= -2.4m/second^2 ( the car has a negative accelaration i.e the acceleration is being  lowered)

May 17th, 2015

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