Question

Question 3 of 15

2 Points

A skydiver slows down from 54 m/s to 4 m/s by opening his parachute. If this

takes 0.75 seconds, what is the magnitude of the skydiver's acceleration?

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O

A. 37.5 m/s?

B. 50 m/s

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C. 66.7 m/s?

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D. 9.8 m/s2

SUBMIT

Answer 1

C.
`66.7m/s^(2)`

Explanation:

We sholud also talk about medium aceleration

`a_(m) =(V_(f)-V_(i))/(t_(f)-t_(i)) = a_(m)=(54-4)/(0.75-0) = 66.7m/s^(2)`

NOTE :
`a=(v/t)=((m)/(s) )/(s) =((m)/(s) )/((s)/(1) )=(m*1)/(s*s) = (m)/(s^(2) )` that are acceleration units