(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A ball was thrown into a box. Determine Ek, P, and throwing speed when the:

mass of softball = 172.7g

mass of packed box = 2,043.5g

and the box moved from 0 cm to 2cm.

and the spring scale that remained parallel to the floor was Ff=8N.

2. Relevant equations

Ff=[itex]\mu[/itex]Fn

Velocity: V=d/t

Momentum: P=mv

Work: W=F(cosθ)d

Kinetic Energy: Ek=1/2mv^{2}

Collision: m_{1}v_{1}+ m_{2}V_{2}= (m_{1}+ m_{2})v'

3. The attempt at a solution

I started with Work.

W=Fd

=8(0.02)

=0.16J

Then tried solving for V

1/2m_{1}v^{2}=1/2m_{2}v^{2}

0.5(172.7)v_{12}=0.5(2043)v_{22}

86.35v_{1}^{2}=1021.5v_{22}

V_{1}= 11.83V_{2}

then plug it in to m_{1}v_{1}+ m_{2}V_{2}= (m_{1}+ m_{2})v' ?

Thank you :)

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# Homework Help: Throwing speed question (ball and a box)

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