Solution:
Initial kinetic energy of the block is
work done by retarding force
According to work energy theorem,
A block of mass 10 kg , moving in x direction with a constant speed of 10 , is subjected to a retarding force F = 0.1x J/m during its travel from x = 20 m to 30 m. Its final KE will be
Initial kinetic energy of the block is
work done by retarding force
According to work energy theorem,