Question

An object of mass 100 kg is acceleated uniformly firm a velocity of 4ms to 8 ms in 2 seconds calculate the initial and final momentum of the object

Answer 1

Answer :-

Initial momentum,u => 400kg m/s

Final momentum,v => 800kg m/s

Explanation :-

Given :

Mass of the object,m => 100kg

Initial velocity of the object,u => 4m/s

Final velocity of the object,u => 8m/s

Time taken,t => 2s

To Find :

Initial momentum = ?

Final momentum = ?

Solution :

We know,

$\sf{}Momentum=mass\times velocity$

Just like that,

Initial mometum,

$\sf{}\implies mass\times initial\ velocity$

$\sf{}\implies 100kg\times 4m/s$

$\sf{}\therefore 400kg\ m/s$

Therefore,initial momentum is equal to 400kg m/s

Final momentum,

$\sf{}\implies mass\times final\ velocity$

$\sf{}\implies 100kg\times 8m/s$

$\sf{}\therefore 800kg\ m/s$

Therefore,final momentum is equal to 800kg m/s

Answer 2

Explanation:

Given, m=100 kg, u= 4m/s, v= 8 m/s

Initial p=mu

p=100×4

=400 kgm/s

final p=mv

=100×8

=800 kgm/s

hence, the initial momentum =400 kgm/s

the final momentum =800 kgm/s

hope it helped u dear...