A mass M slides upward along a rough plane surface inclined at angle horizontal. Initially the mass has a speed V₁ = 2.76 m/s, before it slides a distance L = 1.0 m up the incline. After sliding this distance the new speed of the mass isVo / 2 measured in m/s. What is the acceleration of the sliding mass? (Positive denotes acceleration up the incline; negative denotes acceleration down the incline.)

A mass M slides upward along a rough plane surface inclined at angle horizontal. Initially the mass has a speed V₁ = 2.76 m/s, before it slides a distance L = 1.0 m up the incline. After sliding this distance the new speed of the mass isVo / 2 measured in m/s. What is the acceleration of the sliding mass? (Positive denotes acceleration up the incline; negative denotes acceleration down the incline.)