Question

2)The momentum of a body of mass 5 kg is 10 kgm/s , then its velocity will be


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Answer 1

Answer:

4.4 Joule

Explanation:

Change in momentum, Δp=F.t=0.2×10=2

Initial value of velocity =

5

10

=2m/sec

Initial energy =

2

1

×5×2×2=10J

Total final momentum =10+2=12kgm/sec

Final velocity =

5

12

m/sec

Final energy =

2

1

×5×

5

12

×

5

12

=

5

72

=14.4J

Change in energy =14.4−10=4.4joule

Answer 2

Answer:

__________

Formula :

° Momentum = mass × velocity

_________________

☞︎︎︎ Given :

________

momentum = 10kgm/s

mass = 5kg

___________________

☞︎︎︎ To find :

velocity

__________

☞︎︎︎ solution :

________

➪ p = mv

➪ 10kgm/s = 5kg × v

➪ v = $\frac{<strong>1</strong><strong>0</strong><strong>k</strong><strong>g</strong><strong>m</strong><strong>/</strong><strong>s</strong>}{<strong>5</strong><strong>k</strong><strong>g</strong>}$

➪ v = 2m/s

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