A comet starts from a point very far away from Earth with negligible initial speed…
PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A comet starts from a point very far away from Earth with negligible initial speed relative to Earth. When its distance from the centre of Earth becomes 2RE, where RE=6.4×106m is the radius of Earth, calculate the speed acquired by the comet. Take mass of Earth ME=6.0×1024kg and universal gravitational constant G=6.67×10−11N m2kg−2.