Question

When a stone is thrown in a lake of still water,___ moves along the surface.

• A. wave
• B. stone
• C. matter
• D. water

Answer 1

The correct option is A

wave

When a stone is thrown in still water, a circular pattern of ripples is formed on the surface . The kinetic energy driven by the stone makes the particles to oscillate. The energy gets transferred to the particles of the next layers. Thus, it is the disturbance of the wave that moves forward and not the particles of the medium.