A box of mass 8 kg sits on a horizontal
tabletop. An unstretched spring of force con-
stant 420 N/m runs between the box and a
wall. The coefficient of friction between box
and table is 1/2
. Another box of mass 10 kg is hung from a string of negligible mass tied
to the front of box 1, and allowed to fall from
rest.

μ = 0.5
By what amount has the spring has been
stretched when the acceleration of the boxes
has magnitude 1 m/s2? Assume gravitational
acceleration is 10 m/s2.
Answer in units of m

Question

A box of mass 8 kg sits on a horizontal
tabletop. An unstretched spring of force con-
stant 420 N/m runs between the box and a
wall. The coefficient of friction between box
and table is 1/2
. Another box of mass 10 kg is hung from a string of negligible mass tied
to the front of box 1, and allowed to fall from
rest.

μ = 0.5
By what amount has the spring has been
stretched when the acceleration of the boxes
has magnitude 1 m/s2? Assume gravitational
acceleration is 10 m/s2.
Answer in units of m

loser66 · Answer

do you have a free diagram for this system?

loser66 · Answer

@ybarrap