Finding the diagonal of the paralellogram they form? But this doesn't seem possible to do without knowing the direction of the 2kg ball first.
Also, you are allowed to add momentum quantities, right? I was taught you could do that at least, since they're both mass and speed.
Homework Statement
(It includes a diagram so I'm just going to link it)
#22 from Chapter 7 of the People's Physics Book (second to last page, with the table)
http://scipp.ucsc.edu/outreach/07Momentum.pdf
Homework Equations
p(i)=p(f)
p(f)x=m*v*cosin(theta) [I "made these up", so to speak, but...
Homework Statement
From People's Physics Book, ch. 3:
Homework Equations
For a. I got 23 m/s which is correct and b, 3.6 s which is correct as well. For c I chose the equation
x(t)=x0+v0t+1/2at^2
The Attempt at a Solution
And plugged things in like so... (where upwards is...