Problem $1($Figure A$).$ Determine whether the $50-$kg crate will move under the action of the force $P=300N.$ The coefficient of static friction between the surfaces is $0\mathrm{.}3.$ Draw the free$-$body diagram of the crate.

Problem $2($Figure B$).$ Draw the free$-$body diagram and determine the reactions at the support A and B$.$ Support A is roller and B is pin. Hint: Study the example on Page $226$ of the pdf version of the textbook $({14}^{th}$ edition$).$ The reaction always acts perpendicular to the surface.

Problem $3($Figure C$).$ Draw the free$-$body diagram of the truss and determine the reactions at the supports. Support $A$ is roller and $E$ is pin.

Problem $4($Figure C$).$ Using the reactions obtained in Problem $3,$ calculate the member forces in the truss using the method of joints.