Physics (AS & A Level) · Oct / Nov 2019 · Paper 23 · Question 4

A ball X moves along a horizontal frictionless surface and collides with another ball Y, as illustrated in Fig. 4.1. X A B A B 60.0° 60.0° 6.00 m s–1 0.200 kg BEFORE COLLISION AFTER COLLISION 0.300 kg vX Y X Y Fig. 4.1 (not to scale) Fig. 4.2 (not to scale) Ball X has mass 0.300 kg and initial velocity vX at an angle of 60.0° to line AB. Ball Y has mass 0.200 kg and initial velocity 6.00 m s–1 at an angle of 60.0° to line AB. The balls stick together during the collision and then travel along line AB, as illustrated in Fig. 4.2.

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