Question

A 40kg shell is flying at a speed of 72kilometre/hour it explore it to pieces.one piece of mass 15kg just stops.What is the speed of the other?

Answer 1

Answer:

M=40 kg

M

1

=15kg;V

1

=0

V

D

=72km/h=

3600

72×1000

=20m/s

M

2

=M−M

1

=40−15=25kg

P

i

= initial momentum= MV

0

P

i

=40×20=800kgm/s

P

f

= final momentum

P

f

=M

1

V

1

+M

2

V

2

=15×0+25×V

2

P

f

=25V

2

P

f

=P

i

(momentum conservation)

800=25V

2

V

2

=

25

800

=32m/s

Answer 2

Answer:

60km/hr will be the answer