Rate of Change

Fabiana

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Nov 20, 2011
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In physics, momentum P is defined by P=mv (where m stands for mass and v stands for velocity). A block of frozen nitrogen initially has mass 2kg and travels at 8meters/sec. It is accelerating at 0.5meters/sec2 and losing mass by melting at 0.1kg/sec. What is the rate of change of the momentum after 4 seconds?
 
In physics, momentum P is defined by P=mv (where m stands for mass and v stands for velocity). A block of frozen nitrogen initially has mass 2kg and travels at 8meters/sec. It is accelerating at 0.5meters/sec2 and losing mass by melting at 0.1kg/sec. What is the rate of change of the momentum after 4 seconds?

P = mv
[FONT=&quot]dP/dt = (m)(dv/dt) + (v)(dm/dt)[/FONT]
 
Note that dv/dt=acceleration.

Remember, [SIZE=-1]momentum on an object by a force equals the force multiplied by the time the force is applied.

Thus, say a 10 Newton force is applied to an initially stationary object for 3 seconds, it will

have a momentum of 30 kg m/s to the right. [/SIZE]
 
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