Suppose that $=45$ in$.$

Part A

Determine the normal force the $13-kg$ crate A exerts on the smooth cart if the cart is given an acceleration of $3\frac{m}{s^2}$ down the plane.

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

$N=$

Part B

What is the acceleration of the crate?

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