a 3.2kg mass starts from rest at the top of the 30°inclined that is 6m long its speed as it reaches the bottom is 3m/s use the energy method to find the average friction force that regards the sliding motion

In order of decreasing light-transmitting capabilities of materials, which is the correct sequence? a. transparent -> translucent -> opaque b. opaque -> transparent -> translucent c. opaque -> translucent -> transparent d. translucent -> transparent -> opaque