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January 25, 2015

January 25, 2015

Posted by **please help:)** on Wednesday, March 28, 2012 at 12:43pm.

What is the distance between the point of first contact and the point where the block's speed is greatest?

- physics -
**Elena**, Wednesday, March 28, 2012 at 2:37pmPE =KE =PE (of the spring)

m•g•h = m•v^2/2=k•x^2/2,

h=d•sinα

m•g• d•sinα = k•x^2/2

d=k•x^2/2• m•g•sinα =

=421•(0.24)^2/2•4.6•9.8•sin31o=0.522 m.

The point where the speed is the greatest

is the same point where it was the first

contact with the spring.

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