PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
A block slides across a rough horizontal surface, slows down, and compresses an ideal spring attached to a wall. The surface exerts a kinetic friction force on the block throughout the motion. Which choice of system boundary allows a single conservation-of-energy equation to be written that accounts for kinetic energy, spring potential energy, and the thermal energy produced by friction without including any energy transfer terms across the boundary?
(a) Block + spring + surface
(b) Block + spring
(c) Block + surface
(d) Block only