A 1.2-kg mass is projected up a rough circular track (radius = 0.80 m) as shown. The speed of the mass at point A is 8.4 m/s, and at point B, it is 5.6 m/s. What is the change in mechanical energy between A and B caused by the force of friction? 
Definitions:
Psychological Disorders
Patterns of behavioral or psychological symptoms that impact multiple areas of life, leading to significant distress and impairment in functioning.
Effective Treatment
Therapeutic interventions or approaches that have proven to result in significant improvements in health or well-being, supported by scientific evidence.
Repressed
Describes thoughts, memories, or desires that have been unconsciously blocked due to being considered unacceptable or traumatic.
Serious Auto Accident
A significant vehicular collision resulting in severe damage, injuries, or fatalities.
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