- #1
colachuu
- 2
- 0
Homework Statement
(A)A rubber band slingshot shoots a 25g stone What is the intial speed of a stone if the rubber band is drawn back 0.15m with a force of 27N?
(B) How high will the stone rise if it is shot straight upward?
m=0.025kg
x=0.15m
F=27N
Homework Equations
Ep=1/2Fx
For this question in order to find velocity i believe one has to assume
Ep=Ek
Ek=1/2mv2
v2=2W/m
d=W/F
The Attempt at a Solution
Ep=1/2Fx
Ep=1/2(27N)(0.15m)
Ep=2.025J
Elastic potential energy is converted to kinetic energy when it is shot from the slingshot therefore:
Ep->Ek
2.025J=1/2mv2
v2=(2.025 J)(2)/(0.025kg)
v=12.73m/s
I believe that this would be the initial speed of the stone after being shot however i am having difficulties determining how high the stone would rise if it is shot straight upwards as asked in part (B)
The formula that i think would work is
d=W/F
however I am not sure what W and F are especially considering gravity.
How do i determine these factors??
Thank-you for taking a look!