Question

A body of mass 50g is allowed to fall freely under gravity. calculate it's momentum after 5sconds.(g=980cm/s^2)

Answer 1

it's vel after 5 sec is-
v=u+at u=0 (free fall)
v=g×5
v=5g
momentum=mv i.e. 0.05kg×5g
=.25g=.25×9.8m/s=2.45

Answer 2

Explanation:

245×10³ is correct answer

m=mv

m=50×5

m=250

now,

250×980

=245,000

=245×10³