The Equation Below Describes a Physical Situation Which Description Best Fits the Equation?
A)A 1

The equation below describes a physical situation: $\frac{1}{2}(1.70 \mathrm{~kg}) \left(3.30 \frac{\mathrm{~m}}{\mathrm{~s}}\right) ^{2}+(1.70 \mathrm{~kg}) \left(9.80 \frac{\mathrm{~m}}{\mathrm{~s}^{2}}\right) (2.35 \mathrm{~m}) \sin 30^{\circ}$ $=\frac{1}{2}(1.70 \mathrm{~kg}) \left(4.60 \frac{\mathrm{~m}}{\mathrm{~s}}\right) ^{2}+0.320(1.70 \mathrm{~kg}) \left(9.80 \frac{\mathrm{~m}}{\mathrm{~s}^{2}}\right) (2.35 \mathrm{~m}) \cos 30^{\circ}$ Which description best fits the equation?

A) A 1.70 kg block slows down while sliding down a frictionless plane inclined at a 30 $\degree$ angle.
B) A 1.70 kg block slows down while sliding down a plane with $\mu$ k = 0.320, with the plane inclined at a 30 $\degree$ angle.
C) A 1.70 kg block speeds up while sliding up a frictionless plane inclined at a 30 $\degree$ angle.
D) A 1.70 kg block speeds up while sliding down a plane with $\mu$ k = 0.320, with the plane inclined at a 30 $\degree$ angle.
E) A 1.70 kg block slides over the top of an inclined plane and then descends on the other side. Both planes, inclined at a 30 $\degree$ angle, have $\mu$ k = 0.320.