Two sphere A and B of masses m1 and m2 respectively collide. A is at r...
Two sphere A and B of masses m1 and m2 respectively collide. A is at r...
Given:
- Mass of sphere A = m1
- Mass of sphere B = m2
- Sphere A is at rest initially
- Sphere B is moving with velocity v along x-axis
- After collision, sphere B has velocity v/2 in a direction perpendicular to the original direction
To find:
- Direction in which sphere A moves after collision
Solution:
Conservation of Momentum:
- Before collision, the momentum of the system is given by: P1 = m2v (since sphere A is at rest)
- After collision, the momentum of the system is given by: P2 = m1u1 + m2u2 (where u1 and u2 are the velocities of spheres A and B after collision, respectively)
- According to the law of conservation of momentum, P1 = P2
- Therefore, m2v = m1u1 + m2u2
Conservation of Kinetic Energy:
- Before collision, the kinetic energy of the system is given by: KE1 = (1/2)m2v^2
- After collision, the kinetic energy of the system is given by: KE2 = (1/2)m1u1^2 + (1/2)m2u2^2
- According to the law of conservation of kinetic energy, KE1 = KE2
- Therefore, (1/2)m2v^2 = (1/2)m1u1^2 + (1/2)m2u2^2
Calculations:
- From the first equation of conservation of momentum, we get: u2 = (m2v - m1u1)/m2
- Substituting this value of u2 in the equation of conservation of kinetic energy, we get:
(1/2)m2v^2 = (1/2)m1u1^2 + (1/2)m2(m2v - m1u1)^2/m2^2
- Simplifying this equation, we get: u1 = v/3
Direction of Sphere A:
- Since sphere B has a velocity of v/2 in a direction perpendicular to the original direction, the direction in which sphere A moves after collision is also perpendicular to the original direction
- Therefore, sphere A moves in the y-axis direction (i.e. upwards or downwards)
Answer:
- Sphere A moves in the y-axis direction (i.e. upwards or downwards) after collision.
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