A block with mass m $=3\mathrm{.}89$ kg is placed against a spring on a frictionless incline with angle $31\mathrm{.}0($see the figure$).($The block is not attached to the spring.$)$ The spring, with spring constant k $29$ N$/$cm$,$ is compressed $12\mathrm{.}5$ cm and then released. $($a$)$ What is the elastic potential energy of the compressed spring? $($b$)$ What is the change in the gravitational potential energy of the block$-$Earth system as the block moves from the release point to its highest point on the incline? $($c$)$ How far along the incline is the highest point from the release point?

A block with mass m$=3\mathrm{.}89$kg is placed against a spring on a frictionless incline with angle theta$=31\mathrm{.}0^($@$)($see the figure$).($The block is not

attached to the spring.$)$ The spring, with spring constant k$=29$N$//$cm$,$ is compressed $12\mathrm{.}5$ cm and then released. $($a$)$ What is the elastic

potential energy of the compressed spring? $($b$)$ What is the change in the gravitational potential energy of the block$-$Earth system as

the block moves from the release point to its highest point on the incline? $($c$)$ How far along the incline is the highest point from the

release point?