The wedge A is used to keep the block B in a stationary position. The coefficient of static friction for all contact surfaces is ${}_s=0\mathrm{.}35,$ this is between the wedge A and the incline floor and between the wedge A and the block B$,$ neglecting friction in the rollers. The mass of the block B is $15$ kg and the mass of the wedge $A$ is negligible.

$P=280N,$ and the spring is compressed so that the wedge does not move to the right in

$($Figure $1).$

Part A

Determine the normal force between the wedge A and the incline floor

Express your answer to three significant figures and include the appropriate units.

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Part B

Determine the normal force between the wedge A and the block $B$

Express your answer to three significant figures and include the appropriate units.

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Part C

Determine the spring force necessary to keep the system in equilibrium

Express your answer to three significant figures and include the appropriate units.

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Figure

$1$ of $1$Part D

Determine the compression in the spring

Express your answer to three significant figures and include the appropriate units.

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