Question

find the momentum of a body of mass hundred gram have a kinetic energy of 20 j

Answer 1

we know that K.E. is

K.E. = 1/2mv^2

20 j = 1/2 *0.1 kg * v^2

20 j = v^2/20

v^2 = 400

v = 20

now,

p = mv = 0.1* 20 =2 kgm/s....

Answer 2

answer is 2 kgm/s <- momentum