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Amoving freight car collides with an identical one that is at rest. if momentum is conserved, what happens to the second car after the collision? it attains the same speed as the first car. it moves at half the speed of the first car. it moves at twice the speed of the first car.
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Acar tire rotates at a constant angular velocity of 3.5 rotations during a time interval of 0.75 seconds. what is the angular speed of the tire? in advance for any !
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A ball is thrown upward.
What is its initial vertical speed? The acceleration of gravity is 9.8 m...
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