The potential energy U [in J] of a particle is give (ax+by), where a and b are constants. The mass of the particle is 1kg and x- and y-are the co-ordinates of the particle in metre. The particle at t=0 is rest at (4a,2b).Then Find the speed of the particle when it crosses y-axis

The potential energy U [in J] of a particle is give (ax+by), where a a

1.	The potential energy U [in J] of a particle is give (ax+by), where a and b are constants. The mass of the particle is 1kg and x- and y-are the co-ordinates of the particle in metre. The particle at t=0 is rest at (4a,2b).Then Find the speed of the particle when it crosses y-axis
Answer» `4sqrt(a^(2)+B^(2))` `2sqrt(2(a^(2)+b^(2)))` `SQRT((a^(2)+b^(2))` `sqrt(2(a^(2)+b^(2))` ANSWER :B