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Engineering Physics Conservation Law of momentum

 Dear Students, 

             You know about theory of  Conservation law of momentum, Let we see Interesting videos which explain you in detail

1.                 Conservation law of momentum

Another video which shows application of conservation law of momentum:


2.  Interesting example of conservation law of momentum

We understood the following  things from Law of momentum 

          Using this formula we can calculate the velocity of any object ,or mass of object or momentum of object , Object should be a part of isolated system on which we applying the law of conservation of momentum. 

Try to solve it 

Example 1

         One ship moving with speed of 72 km /hr,one accident occurred and ship broken down into two parts, one part of 4000 kg become rest and another part of 1000 kg is moving with certain velocity, calculate that certain  velocity of this part. The total mass of ship is 50000 kg.

P1=?

m1=?

m2=?

v1=?

v2 =?

Friends here in this example , The mass is given in the unit of SI unit which is kg, but the speed is given in the km/hr which is not SI unit, the SI unit of speed or velocity is m/s. So we have to make conversion between km/hr to m/s  

Let we see the easy and  short cut way to Convert it

1km/hr  = .....................   m/s ??


1km =1000m
1hr= 60 Minuit
1Minuit =60 second

so 1hr = 3600 seconds

          1km/hr= 1000 /3600   m/s

                      = 10/36
          1km/h  =5/18


so friends when you want to convert the speed from km/hr to m/s you can directly find with multiplication of 5/18

for  Example
speed given in above example is 72 km/hr

72 km /hr = ................m/s ??

72*5/18=  20 m/s

so in this way you  can easily convert the unit of velocity.





Excersice; 

1)   60km/hr = ..... m/s ?
2)   216 m/s = ...... km/hr

3)  what is SI unit of momentum ?
4)  one object of  5 kg moving with velocity 25 m/s what will be the momentum of object ?
5)find the examples of conservation law of momentum from everyday life

For more detail ideas visit the following link

More examples of application Momentum

So friends be ready with this excersice , will come with new topic very soon.