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AnnyKZ [126]
3 years ago
14

Which of the following is the correct definition of mechanical energy? A. energy stored in chemical bonds of molecules B. energy

an object has because of its motion or position C. energy of an object due to the random motion of its atoms and molecules D. energy resulting from the flow of charged particles, such as electrons or ions
Physics
2 answers:
Alex787 [66]3 years ago
6 0

The correct answer is B. Energy an object has because of its motion or position

Explanation:

In physics, the mechanical energy of a body or object is determined by the position and/or motion. Due to this, the mechanical energy includes both the kinetic energy (energy during movement) and the potential energy (energy according to location or stored energy). Additionally, the mechanical energy as other types of energy is constant if no forces are acting over it in an ideal system, but in reality, this type of energy is influenced by external forces, for example, friction. Thus, the correct definition of mechanical energy is " Energy an object has because of its motion or position".

Lubov Fominskaja [6]3 years ago
5 0

Which of the following is the correct definition of mechanical energy?

B. energy an object has because of its motion or position

Hope this answers your question!

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Answer:

One piece has a north pole only, and the other piece has à soutn pole only.

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3 years ago
A soccer player takes a corner kick, lofting a stationary ball 33.0° above the horizon at 15.0 m/s. If the soccer ball has a mas
Alexxandr [17]

Explanation:

It is given that,

Mass of the soccer ball, m = 0.425 kg

Speed of the ball, u = 15 m/s

Angle with horizontal, \theta=33^{\circ}

Time for which the player's foot is in contact with it, \Delta t = 5.1\times 10^{-2}\ s

Part A,

The x component of the soccer ball's change in momentum is given by :

\Delta p_x=mv\ cos\theta

\Delta p_x=0.425\times 15\ cos(33)

p_x=5.34\ kg-m/s

The y component of the soccer ball's change in momentum is given by :

\Delta p_y=mv\ sin\theta

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Hence, this is the required solution.

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The uniform 100-kg I-beam is supported initially by its end rollers on the horizontal surface at A and B. by means of the cable
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I attached a free body diagram for a better understanding of this problem.

We start making summation of Moments in A,

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