Question

a boat of mass 50kg is at rest.a dog of mass 5kg moves in the boat with a velocity of 20m/s. what is the velocity of boat (nearly)​

Answer 1

Answer:

the velocity of boat is 2m/s.

Answer 2

$\huge\mathfrak\red{answer}$

velocity of boat = 2m/s

$\huge\mathfrak\red{explanation}$

For a system of bodies that have identical quantities the law of conservation of linera momentum says that :-

The momentum of a system of bodies remains same.

Means -

${m}^{1} \times {v}^{1} = {m}^{2} \times {v}^{2}$

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Now coming to question ----->

Let's say -

Mass of boat = m1 = 50kg

Velocity of boat = v1 = ?

Mass of dog = 5kg

Velocity of dog = 20m/s

Now if we apply law of conservation of linear momentum in this case thus we will get :

$50 {v}^{1} = 5 \times 20$

$50 {v}^{1} = 100$

${v}^{1} = 100 \div 50$

${v}^{1} = 2m \div s$

Thus velocity of boat is 2m/s.

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BY SCIVIBHANSHU

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