Question

A particle of mass 2kg has a momentum of 50 kg m/s. What will be its kinetic energy? *

a)50 J
b)100 J
c)750 J
d)625 J​

Answer 1

Answer:

50 j ...................

Answer 2

Explanation:

since the mass is 2kg.......the velocity will come as follows..

P=M×V. (where p is momentum)

therefore,

50=2×V

=) V=50/2

=) V=25m/s

now the formula of kinetic energy is 1/2mv²

then,

K.E= 1/2×2×25×25

therefore,

K.E= 25×25

K.E= 625 J

that is option (d)

Hope it helps