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a ball ‘A’ of mass m falls to the surface of earth from infinity.Another ball ‘B’of mass 2m falls to the earth from the height equal to six times radius of earth.What would be the ratios of velocities of ‘A’ to’B’ on reaching the earth
a ball ‘A’ of mass m falls to the surface of earth from infinity.Another ball ‘B’of mass 2m falls to the earth from the height equal to six times radius of earth.What would be the ratios of velocities of ‘A’ to’B’ on reaching the earth


4 years ago

DR STRANGE
212 Points
							HI AVNEET, YOU CAN SOLVE IT BY CONCEPT OF CONSERVTION OF ENERGY,CHANGE IN POTENTIAL ENERGY IS KINETIC ENERGY GAINED IN THIS CASE.FOR BALL “B”,$K.E.=P2-P1=m_{b}gR-m_{b} gR(\frac{R^2}{R^{2}+H^{2}}) = m_{b}gR\left ( \frac{H^{2}}{R^{2}+H^{2}} \right )= \frac{1}{2}m_{b}v_{b}^{2}$  FOR BALL “A”,$K.E.= P2-P1=P2$   AS AT INFINITY POTENTIAL ENERGY IS ZERO.$K.E.= \frac{1}{2}m_{a}v_{a}^{2}=m_{a}gR$SO JUST TAKE THE RATIO AND SQUARE ROOT ON BOTH SIDES PUT THE VALUES ma, mb , AND H=6R YOU WILL GET THE ANSWERPLEASE APPROVE THE ANSWERALL THE BEST AVNEET :)

4 years ago
DR STRANGE
212 Points
							SORRY IN FIRST EQUATION $P1= m_{b}gH\left ( \frac{R^{2}}{R^{2}+H^{2}} \right ),$PERFORM THE MATHS AGAINASKIITIANS SHOULD GIVE AN EDIT OPTION FOR THE ANSWERS SORRY FOR THE MISTAKE I HOPE YOU WILL GET IT

4 years ago
DR STRANGE
212 Points
							 IGNORE WHOLE ANSWER ITS INCORRECT! IGNORE WHOLE ANSWER ITS INCORRECT! IGNORE WHOLE ANSWER ITS INCORRECT!

4 years ago
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• 18 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions