(physics) the mass of a body in motion relative to the observer: it is equal to the rest mass multiplied by a factor that is greater than 1 and that increases as the magnitude of the velocity increases
(भौतिकी) प्रेक्षक के सापेक्ष गति में एक शरीर का द्रव्यमान: यह एक द्रव्यमान के बराबर है