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| Q. |
A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments – |
| A. | is zero |
| B. | depends on the total mass of all the fragments |
| C. | depends on the speeds of various fragments |
| D. | is infinity |
| Answer» A. is zero | |
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Explanation: In an explosion, an internal impulse acts in order to propel the parts of a system (often a single object) into a variety of directions. After the explosion, the individual parts of the system (that is often a collection of fragments from the original object) have momentum. |
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