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Two football players collide head-on in midair while chasing a pass. The first player has a mass of 100.0 kg and an initial velocity of 4.70 m/s. The second player has a mass of 124 kg and an initial velocity of -5.00 m/s. What is their velocity (in m/s) just after impact if they cling together? Indicate the direction with the sign of your answer.

Answer :

The velocity of two football players just after they collide and cling together is determined using the conservation of momentum. The combined velocity after the collision is 0.80 m/s in the direction of the first player's initial motion.

The principle of conservation of momentum to find the velocity of two football players just after a collision where they cling together. The problem falls under the domain of classical mechanics in physics. To solve it, we use the formula:

m1v1 + m2v2 = (m1 + m2)v

Where m1 and m2 are the masses of the players, v1 and v2 are their initial velocities, and v is their common velocity after the collision.

For the first player with a mass of 95.0 kg and velocity of 6.00 m/s, and the second player with a mass of 115 kg and velocity of -3.50 m/s, we solve:

(95.0 kg * 6.00 m/s) + (115 kg * -3.50 m/s) = (95.0 kg + 115 kg) * v

v = (570 kg*m/s - 402.5 kg*m/s) / (210 kg)

v = 0.80 m/s

The positive sign indicates that their combined velocity is in the direction of the first player's initial motion.

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