Part B How many seconds does it take to get halfway to the mailbox? A man steps

Question

Part B How many seconds does it take to get halfway to the mailbox? A man steps outside one winter day to go to work. His icy driveway is 7.0 m long from top to mailbox, and it slopes downward at 29 from the horizontal. He sets his briefcase on the ice at the top while opening the garage, and the briefcase slides down the driveway. Ignore friction. Submit X Incorrect; Try Again; 5 attempts remaining Part C How many seconds does it take to reach the mailbox? SubmitP Previous Answers Request Answer

Explanation / Answer

b)

acceleration

a=gsino=9.8sin29=4.75 m/s2

From

S=Vot+(1/2)at2

Here S=d/2 =3.5 m

3.5=0+(1/2)*4.75*t2

t=1.214 s

c)

Now S=d =7 m

7=0+(1/2)*4.75*t2

t=1.717 s

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