A Mass M Is Released from a Height 75 Cm $\mu$

question 14

Multiple Choice

A mass m is released from a height 75 cm from the right-hand side of the track shown in the diagram at right. There is only friction acting on mass along the horizontal portion 30 cm either side of the midpoint O, with a kinetic coefficient of friction of $\mu$ _k = 0.4. Determine how high it reaches the second time it passes over to the left side, and in which direction is it moving when it stops?

• A) 27 cm, R
• B) 3.0 cm, R
• C) 27 cm, L
• D) 3.0 cm, L
• E) 51 cm, R

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