Collision II

# Collision II - Matter &amp; Interactions Collision Cont. 1....

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Matter & Interactions Collision Cont. 1. An alpha particle of mass 4 g/mol collides head-on with an oxygen nucleus of mass 16 g/mol that is at rest. Before the collision, the alpha particle’s velocity is 4.0 × 10 5 m/s in the +x direction. (a) If after the collision, the oxygen nucleus moves with a velocity of 1.6×10 5 m/s in the +x direction, what is the magnitude and direction of the velocity of the alpha particle after the collision? (b) If this collision takes place during a time interval of 1 × 10 -12 s, what is the magnitude of the average net force on the alpha particle during the collision? (d) According to the principle of reciprocity, what can you say about the force of the alpha particle on the oxygen nucleus compared to the force of the oxygen nucleus on the alpha particle? 2. A 21.0 kg body is moving in the direction of the positive x axis with a speed of 220 m/s when, owing to an internal explosion, it breaks into three parts. One part, whose mass is 8.0 kg, moves away from the point of explosion with a speed of 80 m/s in the direction of the positive y axis. A
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