Question

you throw a ball with a mass. of 2.1 kg. the ball leaves your hand at 30 m/s the ball has ______ energy. Calculate it​

Answer 1

Answer:

Explanation:

You have just given the ball kinetic energy, which is given by the following equation:

E

k

=

0.5

×

m

×

v

2

So the energy the ball has the moment after you hit it is:

E

k

=

0.5

×

2.1

×

(

30

)

2

E

k

=

945

J

Answer 2

Answer:

Kinetic energy = 945 J

Explanation:

From the question, we have

mass (m)= 2.1 kg

velocity (v)= 30 m/s

Kinetic energy =

$=\frac{1}{2} *m*v^{2}\\=\frac{1}{2} *2.1*30^{2}\\=945 J$

Kinetic energy = 945 J

Kinetic energy :

The particle or an item that is in motion has a sort of energy called kinetic energy. An item accumulates kinetic energy when work, which involves the transfer of energy, is done on it by exerting a net force. An item in motion has energy, which is called kinetic energy. Motion in space, you walking down the street, and the rotation of the planet around the sun are all examples of kinetic energy. The relationship between kinetic energy and an object's mass and square of its speed is straightforward. Kinetic energy is a scalar quantity that no direction. The kinetic energy of an item can be completely defined by magnitude alone, unlike velocity, acceleration, force, and momentum. The Joule is the common metric unit of measurement for kinetic energy, just like it is for work and potential energy.

To learn more about Kinetic energy visit:

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