Basic Concepts of Physics

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What is the definition of physics?

Physics is the branch of science concerned with the nature and properties of matter and energy.

What is motion in physics?

Motion is the change in position of an object with respect to time.

Define force in physics.

Force is a push or pull upon an object resulting from its interaction with another object.

What is the unit of force?

The unit of force is the Newton (N).

What is energy?

Energy is the ability to do work or cause change.

What is the law of conservation of energy?

Energy cannot be created or destroyed; it can only be transferred or changed from one form to another.

What is mass?

Mass is a measure of the amount of matter in an object.

What is the difference between mass and weight?

Mass is the amount of matter in an object, while weight is the force of gravity acting on that object.

What is the unit of mass?

The unit of mass is the kilogram (kg).

What is a vector quantity?

A vector quantity has both magnitude and direction, like velocity or force.

What is a scalar quantity?

A scalar quantity has only magnitude, like temperature or mass.

What is acceleration?

Acceleration is the rate of change of velocity of an object with respect to time.

What is velocity?

Velocity is the speed of something in a given direction.

What is friction?

Friction is the resistance that one surface or object encounters when moving over another.

What is gravity?

Gravity is a force that attracts any two objects with mass.