Answer
(a) $23N$
(b) increase
Work Step by Step
(a) $N=mgcos\theta$
We plug in the known values to obtain:
$N=(2.9Kg)(9.81m/s^2)(cos36^{\circ})$
$N=(28.449N)(0.809)$
$N=23N$
(b) We know that the normal force will increase if the angle of the incline is reduced because the normal is directly proportional to $\theta$ ($N=mgcos\theta$).
