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A considerable amount of the initial kinetic energy is “lost” in the ballistic pendulum (Sample Problem 11 – 12). Taking this into consideration we can conclude (A) that the calculated speed of the bullet is probably too low. (B) that the calculated speed of the bullet is probably too high. (C) that the calculated speed of the bullet is probably correct only if the collision was elastic. (D) that the calculated speed of the bullet is probably correct because the collisionconserved momentum

A considerable amount of the initial kinetic energy is “lost” in the ballistic pendulum (Sample Problem 11 – 12). Taking this into consideration we can conclude
(A) that the calculated speed of the bullet is probably too low.
(B) that the calculated speed of the bullet is probably too high.
(C) that the calculated speed of the bullet is probably correct only if the collision was elastic.
(D) that the calculated speed of the bullet is probably correct because the collisionconserved momentum

Grade:11

1 Answers

Kevin Nash
askIITians Faculty 332 Points
8 years ago
The correct option is (C).
In an elastic collision, the total kinetic energy of the two bodies remains constant. Thus the total kinetic energy before the collision equals the total kinetic energy after collision. As, a considerable amount of the initial kinetic energy is lost in the ballistic pendulum, therefore we conclude that, the calculated speed of the bullet is probably correct only if the collision was elastic. From the above observation we conclude that, option (C) is correct.

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