How Far Will the Spring Compress in a Frictionless Collision?

[Joshua Lee]

Homework Statement

A 2 kg block collides with a massless spring of spring constant 94 N/m attached to a wall. The speed of the block was observed to be 1.4 m/s at the moment of collision. The acceleration of gravity is 9.8 m/s 2 . How far does the spring compress if the surface on which the mass moves is frictionless? Answer in units of cm.

Homework Equations

(1/2)kx^2
(1/2)mv^2

The Attempt at a Solution

(1/2)kx^2=(1/2)mv^2
Solved for x
x= sqrt((mv^2)/(k))
Plugged in values and I got 0.20421
Apparently not right though[/B]

 

[TSny]

Answer in units of cm.

 

[Joshua Lee]

Facepalming so hard right now. Thanks!

 

[TSny]

No need to feel bad...happens to all of us.

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