Question:11 A particle is projected from infinity with a velocity of . The perpendicular distance between the target and initial velocity is b. The mass of the particle m experiences repulsive inverse square force. Then closes approach d is. k Question:12 A particle oscillating in a field with potential energy is given by. If the amplitude of small oscillation is a, then time period T is O Proportional to O Proportional a O Proportional to 1ha O Proportional to a 37