A 20-g bullet is fired at a 5-kg square panel of side b = 300 mm. The velocity of the bullet just before the collision is 500 m/s, with = 15°, and is embedded into the plate after impact with a duration of 2.5 × 10 seconds. Knowing that the horizontal component of the impulsive reaction at A is zero, which of the following momentum-impulse diagrams represents the given situation?

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Strain energy

The term strain indicates the variation in an object's length, area, and volume when the object is subjected to an external force. The external force may be of normal, shear, moment, torque, etc. The strain in an object depends on the types of external force and cross-section of the object. Mathematically, the evaluation of strain can be obtained with the help of elastic constants.