Question

plzzz me to find the answer plzzz

Answer 1

hey mate
here's the solution

Answer 2

equate kinetic energies

mv^2/2 = kx^2/2

mv^2 = kx^2

2 x 10^2 = k x (1/4)^2   [25 cm = 1/4 m]

200 = k x 1/16

k = 200 x 16 = 3200 N/m

hope this helps amrk the brainliest