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2 years ago

Calculate the kinetic energy of a 4.00kg object traveling at 16.0 m/s

Physics

2 answers:

Nataly [62]2 years ago

4 0

Answer:

Kinetic energy is 512 Joules

Explanation:

Given that,

Mass of the object, m = 4 kg

Velocity with which the object is moving, v = 16 m/s

We need to find the kinetic energy of the object. It is given by :

$E_k=\dfrac{1}{2}mv^2$

$E_k=\dfrac{1}{2}\times 4\ kg\times (16\ m/s)^2$

$E_k=512\ J$

So, the kinetic energy of the object is 512 Joules. Hence, this is the required solution.

Elenna [48]2 years ago

3 0

KE = ½mv² = ½(4.00 kg)(16.0 m/s)² = 512 J

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3 years ago

A woman is 160160cm tall. What is the minimum vertical length of a mirror in which she can see her entire body while standing up

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This question is incomplete, the complete question is;

A woman is 160cm tall. What is the minimum vertical length of a mirror in which she can see her entire body while standing upright.

Hint: Consider the ray diagram below, of the rays that enable her to see her feet and the top of her head.

Use what you know about the law of reflection, together with a bit geometry.

The missing Image is uploaded along this answer below.

Answer:

the minimum vertical length of a mirror in which she can see her entire body while standing upright is 80 cm

Explanation:

Given the data in the question and illustrated in the image below,

From image 2;

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Therefore, since her height is 160 cm

a + b = 160 ------ let this be equation 1

i.e AD + DG = 160 cm

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