# Block on Incline

1. Feb 22, 2010

### mparsons06

1. The problem statement, all variables and given/known data

A cube of mass M=0.425 kg is placed on an incline of 12.5* and given a push. It slides down, and its speed down the incline is measured at two positions, [1] and [2] on the diagram below, with V1 = 0.913 m/s and V2 = 1.171 m/s. Note that the incline passes through at least two grid intersections and that one cube corner is at x grid lines. (See attachment.)

A. Calculate μk, the coefficient of kinetic friction for the block on the incline.

B. Calculate the travel time of the cube from position 1 to position 2.

2. The attempt at a solution

A. Attempt 1 - Incorrect - 0.813
Attempt 1 - Incorrect - 0.2216
Attempt 1 - Incorrect - 0.222

B. Attempt 1 - Incorrect - 2.67 s

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2. Feb 22, 2010

### aim1732

What is the problem? Just calculate the acceleration down the incline with a supposed coefficient of friction. Then use kinematic eqns. to make out the coefficient.