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nkentros7
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Homework Statement
A 165g plastic block is set up against a spring. The block rests on a smooth (I'm assuming this implies that there is no friction involved) horizontal surface. The block is pushed into the spring, compressing it a distance of 15.0 cm and released. The spring constant is k= 677 N/m
(a) What is the speed of the block when it leaves the spring?
(b) If the table is 0.875m in height, what horizontal distance does the block travel after it leaves the table edge?
Homework Equations
After a bit of research, I found Hooke's Law: F=kx (where k is the constant provided in the problem statement)
F=ma
Perhaps one of the kinematics equations; Vf^2 = Vi^2 + 2a(delta X)
The Attempt at a Solution
The first thing I did was use the value given for k and the compression distance of 15 cm (converted to .15m for unit accuracy) to solve for the force, which came out to be 101.55N. With this, I can solve for acceleration, as we were given the mass. I get stuck here: how can I solve for initial velocity with only acceleration and force? I thought about using the distance that the string was compressed as a value for delta X, but that still leaves me missing data needed to solve for the initial velocity in one of the kinematics equations. I haven't tried assuming the information given in part B as part of A yet, but maybe there was a mistake on my teacher's part (including information in part B that is necessary for part A)
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