\[\frac{{{\partial }^{2}}u}{\partial {{t}^{2}}}={{c}^{2}}\frac{{{\partial }^{2}}u}{\partial {{t}^{2}}}\] represents the equation for:

Motion of a projectile in a gravitational field

Vibration of a stretched string

Oscillation of a simple pendulum

\[\frac{{{\partial }^{2}}u}{\partial {{t}^{2}}}={{c}^{2}}\frac{{{\part

1.	\[\frac{{{\partial }^{2}}u}{\partial {{t}^{2}}}={{c}^{2}}\frac{{{\partial }^{2}}u}{\partial {{t}^{2}}}\] represents the equation for:
A.	Vibration of a stretched string
B.	Motion of a projectile in a gravitational field
C.	Heat flow in thin rod
D.	Oscillation of a simple pendulum
Answer» B. Motion of a projectile in a gravitational field

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\[\frac{{{\partial }^{2}}u}{\partial {{t}^{2}}}={{c}^{2}}\frac{{{\partial }^{2}}u}{\partial {{t}^{2}}}\] represents the equation for:

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