A(n) 12500 lb railroad car traveling at 7.8 ft/s couples with a stationary car of 7430 lb. the acceleration of gravity is 32 ft/s 2 . what is their velocity after the collision

To solve this problem we will apply the concepts related to the conservation of momentum. That is, the final momentum must be the same final momentum. And in each state, the momentum will be the sum of the product between the mass and the velocity of each object, then

Here,

= Mass of each object

= Initial velocity of each object

= Final velocity of each object

When they position the final velocities of the bodies it is the same and the car is stationary then,

Rearranging to find the final velocity

The expression for the impulse received by the first car is

Replacing,

The negative sign show the opposite direction.

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation:

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