Question

Which of the following has potential energy but no kinetic energy? Longitudinal sound waves An arrow shot from a bow A compressed spring A vibrating atom

Answer 1

Answer:

A compressed spring

Explanation:

A compressed spring has potential energy only and no kinetic energy.

This is because kinetic energy is only possessed by particles in motion.

Energy in a compressed spring= -1/2kx² where x is the displacement.

In this equation there is no velocity so there is no kinetic energy.

Answer 2

Answer:

A compressed spring

Explanation:

Option C is correct. The potential energy is the energy stored in a compressed spring. This potential energy depends on the spring constant and the distance traveled by the spring as it is stretched. The work that is done in stretching a spring gets stored in the compressed spring as potential energy.

Option A is incorrect. As sound wave is a mechanical wave that carries both potential and kinetic energy.  

Option B is incorrect. Arrow shot from a bow has kinetic energy.  

Option D is incorrect. A vibrating atom has vibrational energy.