Two hockey players are about to collide on the ice. One player has a mass of 70 kg and is traveling at 1.4 m/s north. The other has a mass of 75 kg and is traveling at 1.0 m/s south. The system consists of the two hockey players. According to the law of conservation of momentum, what is the total momentum of the system after they collide? Assume the collision is an elastic collision. A. 173 kg·m/s south B. 23 kg·m/s north C. 23 kg·m/s south D. 173 kg·m/s north
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- Mass of player 1, \( m_1 = 70 \) kg - Velocity of player 1, \( v_1 = 1.4 \) m/s north - Mass of player 2, \( m_2 = 75 \) kg - Velocity of player 2, \( v_2 = 1.0 \) m/s south Show more…
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Nishant K.
An ice hockey forward with mass $70.0 \mathrm{~kg}$ is skating due north with a speed of $5.5 \mathrm{~m} / \mathrm{s}$. As the forward approaches the net for a slap shot, a defensive player (muss $110 \mathrm{~kg}$ ) skates toward him in order to apply a body-check. The defensive player is traveling south at $4.0 \mathrm{~m} / \mathrm{s}$ just before they collide. If the two players become intertwined and move together after they collide, in what direction and at what speed do they move after the collision? Friction between the two players and the ice can be neglected.
A $91.0-$ kg hockey player is skating on ice at $5.50 \mathrm{m} / \mathrm{s}$. Another hockey player of equal mass. moving at $8.1 \mathrm{m} / \mathrm{s}$ in the same direction, hits him from behind. They slide off together. a. What are the total energy and momentum in the system before the collision? b. What is the velocity of the two hockey players after the collision? c. How much energy was lost in the collision?
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