All Original
Thursday, February 18th, 2010
How fast is a moving object when it has gained all of the springs’ original stored energy?
A 1kg object on a frictionless, horizontal lab table is pushed against a spring of force constant 100N/m and then released. Just before the object is released, the spring is compressed 0.3m. How fast is the object moving when it has gained all the springs’ original stored energy?
a. 2m/s
b. 3m/s
c. 5m/s
d 1m/s
e. 10m/s
I believe you have to use conservation of energy.
PE_0 = KE_f
PE of a spring = .5*k*x^2 = .5 * 100 * .3^2 = 4.5
where k is the spring constant and x is the distance in meters
KE = .5 * m * v^2
Set them equal to each other and solve for v
all original
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