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3 years ago

A 10 gram ball is rolling at 3 m/s. What is the energy the ball has?

Physics

1 answer:

s344n2d4d5 [400]3 years ago

6 0

Answer:

K = 0.045 J

Explanation:

It is given that,

Mass of a ball, m = 10 g = 0.01 kg

Speed of the ball, v = 3 m/s

To find,

The energy of the ball.

Solution,

Due to the motion of the ball, it will have kinetic energy. It can be given by the formula as follows :

$K=\dfrac{1}{2}mv^2\\\\K=\dfrac{1}{2}\times 0.01\times 3^2\\\\K=0.045\ J$

So, the ball will have a kinetic energy of 0.045 J.

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Answer:

It must be high do to the gravity

Explanation:

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2 years ago

What is a conservative force?

almond37 [142]

Answer:

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Explanation:

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3 years ago

g A cylinder of mass m is free to slide in a vertical tube. The kinetic friction force between the cylinder and the walls of the

sdas [7]

Answer:

The vertical distance is $d = \frac{2}{k} *[mg + f]$

Explanation:

From the question we are told that

The mass of the cylinder is m

The kinetic frictional force is f

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$E = P + W_f$

Here E the the energy of the spring which is increasing and this is mathematically represented as

$E = \frac{1}{2} * k * d^2$

Here k is the spring constant

P is the potential energy of the cylinder which is mathematically represented as

$P = mgd$

And

$W_f$ is the workdone by friction which is mathematically represented as

$W_f = f * d$

$\frac{1}{2} * k * d^2 = mgd + f * d$

=> $\frac{1}{2} * k * d^2 = d[mg + f ]$

=> $\frac{1}{2} * k * d = [mg + f ]$

=> $d = \frac{2}{k} *[mg + f]$

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4 years ago

A bolt falls off an airplane high above the ground. How far does the bolt have to fall before its speed reaches 100m/s (about 20

omeli [17]

We can use the equation vf (the final velocity) =vi (the initial velocity) +at (aceleration times time)

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3 years ago

Which type of electromagnetic radiation has the highest frequency?

Likurg_2 [28]

Explanation:

As we know that relation between energy and wavelength is as follows.

E = $\frac{hc}{\lambda}$

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Also, f = $\frac{c}{\lambda}$

Hence, less will be the wavelength more will frequency of a radiation.

Gamma rays are the rays that have highest energy, small wavelength and highest frequency.

Thus, we can conclude that gamma rays are the electromagnetic radiation which has the highest frequency.

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3 years ago