Question

if two stones ' x and y of equal masses have velocities v and 2v respectively then what will be the ratio of momentum of x to that of y. ​

Answer 1

Answer:

Explanation:

let two bodies of masses,

body x = m body y = m (because they are equal in

mass)

given.

body x = v body y = 2v

k.e. of x = 1/2mv^2

k.e. of y = 1/2m(2v)^2 = = 2/1/2*m* 4 *v² 2 2mv²

ratio = K.E.ofx

K.E.ofy

1*mv² = 2

2mv²

= 1/4=1:4

Answer 2

Explanation:

Answer

Correct option is

D

1:4

K.E=0.5×m×v

2

K.E(1st)=0.5×m×v

2

K.E(2nd)=0.5×m×(2v)

2

Hence the ratio is 0.5×m×v

2

:0.5×m×(2v)

2

=1:4

Hence the ratio is 1:4.