As shown in the figure below, a billiard ball traveling at 4m/s in the positive

Question

As shown in the figure below, a billiard ball traveling at 4m/s in the positive x-direction hits another (identical) billiard ball which is at rest before collision. After the collision the first ball is moving at an angle of 45o above the x-axis while the other one is moving at an angle of 45o below the x -axis. Assume that the mass of each ball is 250 g and  the collision is perfectly elastic. What is the total kinetic energy of the system before the collision?

In the situation described in problem 2, what is the total linear momentum in the y-direction before the collision?

zero

1 kg m/s

0.7 kg m/s

2 kg m/s

zero

1 kg m/s

0.7 kg m/s

2 kg m/s

As shown in the figure below, a billiard ball traveling at 4m/s in the positive x-direction hits another (identical) billiard ball which is at rest before collision. After the collision the first ball is moving at an angle of 45degree above the x-axis while the other one is moving at an angle of 45degree below the x -axis. Assume that the mass of each ball is 250 g and the collision is perfectly elastic. What is the total kinetic energy of the system before the collision? In the situation described in problem 2, what is the total linear momentum in the y-direction before the collision? zero 1 kg m/s 0.7 kg m/s 2 kg m/s

Explanation / Answer

2 kg m/s

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