00:01
The question is asking to find the momentum of the propellant gases when they leave the muscle of the refill.
00:08
Let us add the given data.
00:09
Given the mass of the rifle, let us generate with mr, is equal to 2 .8 kg.
00:21
The mass of the bullet, let us represent with mb is equal 0 .00720 k.
00:29
The velocity it is given the velocity of bullet with respect to rifle.
00:34
Velocity of blade vb with respect to rifle descent.
00:40
So vbr is equal to 6 .01 meter per second and also said the velocity of rifle with expected to earth.
00:51
This is actual velocity.
00:53
The above one is related to velocity.
00:56
This is actual velocity.
00:57
And also there is it the it recals in the opposite direction.
01:03
Let us draw a diagram.
01:04
Here the rifle velocity is opposite to the velocity of bullet, vb, which is the original velocity with respect to earth.
01:12
We need to find vb first.
01:13
First let us to sunconvection vr will be minus 1 .85 meter per second.
01:19
To find vb, the original velocity, we know the relation vbr is equal to vb minus vr.
01:29
So i'm suffering the values here 6 .01 is equal to vb, we know...
