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mafiozo [28]
3 years ago
11

The mass of a moving object increases, but its speed stays the same. What happens to the kinetic energy of the object as a resul

t? A.It decreases. B. It increases. C. It remains unchanged. D. It fluctuates up and down.
Physics
2 answers:
Nuetrik [128]3 years ago
8 0

Answer:

B. It increases.

Explanation:

ozzi3 years ago
5 0
The correct answer is 
B It increases.

In fact, the kinetic energy of a moving object is given by
K= \frac{1}{2}mv^2
where m is the mass of the object and v is its speed. We see that the kinetic energy is proportional to the mass and proportional to the square of the speed: in this problem, the speed of the object remains the same, while its mass increases, therefore the kinetic energy will increase as well.
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Answer:

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Explanation:

Given that

Mass of the cart A, m1 = 450 g

Speed of the cart A, v1 = 0.85 m/s

Mass of the cart B, m2 = 300 g

Speed of the cart B, v2 = 1.12 m/s

Now, using the law of conservation of momentum.

It is worthy of note that our cart B is moving in opposite directions to A

m1v1 + m2v2 =

(450 * 0.85) - (300 * 1.12) =

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If we convert to kg, we have

46.5 / 100 = 0.465 kgm/s

Thus, the total momentum of the system is 0.465 kgm/s

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