The second victim in a motorcycle accident that occurred in Dartmouth earlier in the week died Thursday at Rhode Island Hospital, police said. Dartmouth police said Jennifer Costa, 31, of Fall River, died of her injuries after the motorcycle she was riding on collided with a car and propelled her forward, leaving her pinned under a car. She was airlifted to the hospital with the motorcycle’s driver, Stephen Adams, also of Fall River. Adams was pronounced dead soon after arriving at Rhode Island Hospital. No further information was immediately available Friday night.