A0.42 kg shuffleboard disk is initially at rest when a player uses a cue to increase its speed to 4.2 m/s at constant acceleration. the acceleration takes place over a 2.0 m distance, at the end of which the cue loses contact with the disk. then the disk slides an additional 12 m before stopping. assume that the shuffleboard court is level and that the force of friction on the disk is constant. what is the increase in the thermal energy of the disk – court system (a) for that additional 12 m and (b) for the entire 14 m distance? (c) how much work is done on the disk by the cue?

Answer

given,

mass of the shuffleboard disk = 0.42 kg

speed of the cue is increased to = 4.2 m/s

acceleration takes over 2 m then acceleration is zero.

the disk additionally slide to 12 m

final speed of disk = 0 m/s

a) increase in thermal energy

b)  

F_f is the frictional force

increase in thermal energy for entire movement of 14 m

c)  Work done on the disk by the cue

   W = 3.704 + 0.616

   W  = 4.32 J

all of the answers are correct.

falsification is manipulating research materials, equipment, or processes or changing or omitting data or results such that the research is not accurately represented in the research record. plagiarism is the appropriation of another person's ideas, processes, results, or words without giving appropriate credit.

explanation:

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered