Question

An object travels 16 metre in 4 second and then another 16 metre in 2 second. what is the average speed of the object ?​

Answer 1

${\underline{\boxed{\mathcal{\pmb{\quad GIVEN \qquad}}}}}$

• An object travels 16 m in 4s and then another 16 m in 2s.

${\underline{\boxed{\mathcal{\pmb{\quad TO \: FIND \qquad}}}}}$

• Average speed ?

${\underline{\boxed{\mathcal{\pmb{\quad SOLUTION\qquad}}}}}$

• Total distance travelled by the object = 16 m + 16 m = 32 m

• Total Time taken = 4 s + 2 s = 6 s

• We know that,

${ \underline{ \boxed{ \pink{ \rm{Average \: Speed = \frac{Total \: distance \: travelled}{Total \: time \: taken}}}}}}$

$\implies{ \rm{Average \: Speed = \frac{32 \: m}{6 \: s} }}$

$\implies{ \rm{Average \: Speed = 5.33 \: m/s}}$

• Hence, the average speed of the object is 5.33 m/s.

_________________________

${ \underline{\blue{ \rm { More \: Information :}}}}$

★ What is Speed ?

• The travelled by the object in unit time.
• The SI unit of speed is m/s.
• To specify the speed of an object, we require only its magnitude. The speed of an object need to be constant. In most cases, objects will be in non – uniform motion. Therefore, we describe the rate of motion of such objects in terms of their average speed. The average speed of an object is obtained by dividing the total distance travelled by the total time taken. i.e,
• ${ \underline{ \boxed{ \rm{Average \: Speed = \frac{Total \: distance \: travelled}{Total \: time \: taken}}}}}$

Answer 2

Given :-

• An object travels 16m in 4s then another 16m in 2s.

To find :-

• Find the Average speed ?

★ $\large\underline{\frak{As~we~know~that,}}$

$\large\dag$ Formula Used :

• $\boxed{\bf{Average \: Speed = \frac{Total~distance~travelled}{Total~time~taken}}}$

Solution :-

• Total distance travelled by the object = 16m + 16m = 32m
• Total Time taken = 4s + 2s = 6s

:$\implies$ ${\rm{Average~Speed}}$=$\large{\sf{\frac{32m}{6s}}}$

$~~~~~$:$\implies$${\rm{Average~Speed}}$= ${\underline{\boxed{\pink{\frak{5.33~m/s}}}}}$★

$\therefore$ Hence,

• The Average speed of the object is = $\large\underline{\rm{5.33~m/s}}$.

____________________________________

$\underline{\rm\purple{Additional~Information :}}$

What is speed ?

❍ Speed :

• It gives an idea of how slow or fast that body is moving.

• Speed is the body of the distance travelled by it per unit time.

• $\boxed{\rm{Speed = \frac{Distance}{Time}}}$

• $\boxed{\rm{Speed = \frac{d}{t}}}$

• S.l unit = m/s

• Speed is a scalar quantity as it has magnitude only.

❍ Velocity :

• Speed does not give the idea of direction of motion.

$\therefore$to know the exact position of moving object direction should also be known.

• Velocity of a body is the direction travelled by it per unit time in a given direction.

• $\boxed{\rm{Velocity = \frac{Distance~travelled~in~a~given~direction}{Time~taken}}}$

${\rm{V = {Displacement}{Time}}}$

$\therefore$Velocity of the body is the displacement produced per unit time.

S.l unit = m/s

• Velocity measures the rate of change in position that is change in position per unit time.

• Velocity is a vector quantity as it has magnitude as well direction.