a newspaper boy throws newspapers sideways onto the porches of his customers while riding his bicycle along the sidewalk. the sidewalk is 15 m in from of the porches. the boy throws the papers at a horizontal speed of 6 m/s relative to himself and rides the bicycle at 4 m/s relative to the sidewalk.(adsbygoogle = window.adsbygoogle || []).push({});

Calculate:

a) the horizontal velocity of the paper with respect to the sidewalk. Ans: 7.2 m/s

so i made the paper boy traveling south, the papers being thrown west.

*PE means paper with respect to the earth

[tex]\overrightarrow{V_{PE}}=[-6,0]+[0,-4][/tex]

[tex]\overrightarrow{V_{PE}}=[-6,-4][/tex]

using the components a) is~ 7.2 m/s West 34degrees South

okay here where i dont know where to start, it doesn't say how to do this in my book so i thought id ask you guys.

b)how far in advance of the walkway should he release the papers so that they land on the porch?

how would i approach this? do i just have to think hard or is some formulas that could help me solve this?

c)if he waits until he is directly opposite the porch, at what angle with respect to the sidewalk must he throw the paper so that it lands on target?

i think i'll need the answer to "b" to solve this no? if not some hints would be greatly apreciated.

thanks guys

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# Homework Help: Paper boy problem (relative motion)

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