A particle of mass m is projected with velocity from the

Last updated: 6/12/2023

A particle of mass m is projected with velocity from the surface of the earth In list 1 different ranges of the speed of the particle are given in P Q R and S In list II the kinetic energy K gravitational potential energy U and total energy E of the earth particle system are given Each case in list I may correspond to one or more choices given in list II Further the point at infinity is taken as the zero potential energy reference level Take escape velocity VE 11 kms List l P Projected with 5 kms 1 making an angle of 30 with the horizontal Q Dropped into a hole drawn along the diameter of earth R Projected with 9 kms 1 S Projected with 11 kms 1 OP 1 2 3 Q 1 25 R 125S 12 45 OP 1 2 3 Q 1 25 R 125S 124 1 2 3 4 5 List II Total energy E is negative Potential energy Ujis negative Kinetic energy K never become zero Total energy K becomes zero Kinetic energy K may become zer