Question

Speed, distance, mass, velocistys​

Answer 1

Speed:

In everyday use and in kinematics, the speed of an object is the magnitude of the rate of change of its position with time or the magnitude of the change of its position per unit of time.

Distance:

Distance is a numerical measurement of how far apart objects or points are. In physics or everyday usage, distance may refer to a physical length or an estimation based on other criteria.

Mass:

Mass, in physics, quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force. The greater the mass of a body, the smaller the change produced by an applied force.

Velocity:

The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion.

Explanation:

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Answer 2

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☆ Speed

It is defined as the rate of change of position of an object in any direction . Speed is measured as the ratio of distance to the time in which the distance was covered. Speed is a scalar quantity as it has only direction and no magnitude.

The formula of speed is :-

$s = \frac{d}{t}$

Where,

• s is the speed in m.s^-1
• d is the distance traveled in m
• t is the time taken in s

The units of speed :-

$CGS \: system  = cm {s}^{ - 1} \\ SI \: system =  m {s}^{ - 1}$

☆ Distance

Distance is the total movement of an object without any regard to direction. Distance is a scalar quantity , which means distance of any object does not depend on direction of its motion .

Distance Formula :-

$Δd=d1+d2$

☆ Mass

It is one of the fundamental quantities in Physics and the most basic property of matter. We can define mass as the measure of the amount of matter in a body.

$SI \: unit \: of \: mass \: = kg$

The mass formula is :-

$Mass = ρ × v$

Where,

• ρ = density
• v = volume

Note: The mass of a body does not change at any time .

☆ Velocity

Velocity of an object can be defined as the rate of change of the object’s position with respect to a frame of reference and time . It is a vector quantity, which means we need both magnitude (speed) and direction to define velocity.

$SI \: unit \: of velocity \: = \: m {s}^{ - 1}$

Formula of velocity

$V = \frac{s}{t}$

Where,

• s = displacement
• t = time taken