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?
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)?
7) About 20 ft/s.
can you answer number 8 too please...
Sure, give me just a second.
Avg acceleration is defined by the formula:
dAcceleration/time, or, the change in acceleration over a period of time.
Here we have to convert from km/h to m/s:
89 km/hr * 1000m/1km = 89000 m/hr * 1 hr/60 min * 1min/60s = 24.722 m/s
37 km/hr * 1000m/1km * 1hr/60 min * 1 min/60s = 10.277 m/s
So the avg acceleration formula is:
vf-vi/t= (10.277 m/s - 24.722 m/s)/6s = -2.407 m/s/s, depending on how picky your instructor is with sig figs :)
I'm so sorry that took so long, but I wanted to make sure that you had each and every step. It takes a moment to type it all up :)
Ok. Both answers resolved here.
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