Tag: forms of energy

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Multiple choice physics the essence of change forms of energy and energy conservation energy for everything forms of energy

What is potential energy?

  1. Energy of an abject due to its position or arrangement in a system

  2. Energy of an abject due to its nature or arrangement in a system

  3. Energy of an abject due to its shape or arrangement in a system

  4. None
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A Correct answer
Explanation

Energy of an abject due to its position or arrangement in a system is potential energy. 

Multiple choice physics the essence of change forms of energy and energy conservation energy for everything forms of energy

Potential energy is classified into which two energy?

  1. Gravitational and Elastic Potential Energy

  2. Kinetic and Elastic Potential Energy

  3. Mechanical and Elastic Potential Energy

  4. None
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Explanation

Gravitational and Elastic Potential Energy are two types of potential energy

Gravitational potential energy: Energy stored in the object at a certain height above ground.
Elastic potential energy:Energy stored in streched or compressed spring.

Multiple choice physics the essence of change forms of energy and energy conservation energy for everything forms of energy

Identify, which of the following energies can be positive only:

  1. Kinetic energy

  2. Potential energy

  3. Mechanical energy

  4. Both kinetic and mechanical energies.
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Explanation

Potential energy is the energy stored by the virtue of the position of a body.While,kinetic energy is the energy possessed by the virtue of motion.
Hence, K.E is always +ve .
When a body is raised to a particular height,work is done against the force of gravity and P.E is $ - $ve.
When the body is falling freely the work is done in the direction of force of gravity and P.E is $+$ ve.

Multiple choice physics the essence of change forms of energy and energy conservation energy for everything forms of energy

Identify, which of the following energies can be positive only

  1. kinetic energy

  2. potential energy

  3. mechanical energy

  4. both kinetic and mechanical energies
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Only kinetic energy can have positive value. Potential energy has negative value and mechanical energy is combination of these two hence can either be positive or negative.