Question

a trolley auto has 3 quintals of bags . if the weight of a bag is 25 kg , then how many bags are there in that trolley auto?​

Answer 1

Step-by-step explanation:

Since the hole is on the floor , that means sand is falling vertically with respect to trolley. Therefore there is no force in horizontal direction hence in horizontal direction momentum is conserved.

Let M= mass of trolley

m= mass of sandbag

v

1

= initial velocity

v

2

= final velocity ( to be found)

Then P

1

=(M+m)v

1

when the sand bag is empty the momentum is

P

2

=(M+0)v

2

Momentum is conserved in horizontal direction so

P

1

=P

2

⇒=v

2

=

M

(M+m)

v

1

=

300

300+25

×27×

18

5

=8.215m/s