4 years ago

If two people answer i will give brainliest to the first one that answers if right

Physics

1 answer:

Simora [160]4 years ago

5 0

Answer:

Choice A) A Plant cell

Explanation:

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Object A has 25 J of kinetic energy. Object B has one-quarter the mass of object A.By what factor does the speed of each object

Natalka [10]

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The speed of object B is 2 times of speed of object A.

Explanation:

Given that,

Kinetic energy of object A = 25 J

Mass of object B $m_{B}=\dfrac{1}{4}m_{A}$

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We need to calculate the factor of the speed of the object

Suppose the final kinetic energy is same for both object.

$K.E_{f_{A}}=K.E_{f_{B}}$

$\dfrac{1}{2}m_{A}v_{A}^2=\dfrac{1}{2}m_{B}v_{B}^2$

Put the value into the formula

$\dfrac{1}{2}m_{A}\times v_{A}^2=\dfrac{1}{2}\times\dfrac{1}{4}m_{A}\times v_{B}^2$

$\dfrac{v_{A}}{v_{B}}=\dfrac{1}{2}$

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$v_{B}=2v_{A}$

Hence, The speed of object B is 2 times of speed of object A.

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