Initially sliding with a speed of 2.3 m/s, a 2.0 kg block collides with a spring and compresses it 0.41 m before coming to rest. What is the force constant of the spring?

Answer 1

1/2 kx^2=1/2 m v^2
solve for k

Answer 2

1/2(2)(2.3)^2=5.29