A1.2 kg block is held at rest against the spring with a force constant k= 730 n/m. initially, the spring is compressed a distance d. when the block is released, it slides across a surface that is frictionless except for a rough patch of width 5.0 cm that has a coefficient of kinetic friction = 0.44. find d, such that the block's speed after crossing the rough patch is 2.3 m/s.

d = 9.69 cm

Explanation:

given,

mass of the block = 1.2 Kg

spring force constant(k) = 730 N/m

spring is compressed = d = ?

rough patch width = 5 cm

μ_k = 0.44

work done by friction = energy lost

d = 0.0969 m

d = 9.69 cm

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach