- #1
rain_ex
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Homework Statement
A 50g ice cube has no friction. It compresses a string with the constant 25 N*m a total of 10 cm. Find the max height reached by the ice cube before it starts sliding back down the slope, after it is released from the spring.
Known:
m = 50g (.05kg)
k = 25 Nm
x = 10cm (.1m)
Homework Equations
E0 = E <- general
Us0 = Ug <- expanded
1/2kx2 = mgh <- final equation
The Attempt at a Solution
I ended up with 0.255m. Is this correct? I solved for the variable "h".
Homework Statement
A cannon angled 30 degrees above the horizontal launches a cannanball at 80 m/s. if the cannon is 10 m above the ground with what speed does the cannon ball strike the ground?
Homework Equations
E0 = E <- general
Ug0 + K0 = K <- expanded
mgh+1/2mv02 = 1/2mv2 <-final equation
The Attempt at a Solution
I ended up with 81.216 m/s. I solved for the variable "v".
Please check my solutions for me! Thank you!