Question

The initial velocity of a body is 80m/s and its velocity reaches 120m/s in 5 seconds, calculate its average velocity.

Answer 1

Anѕwєr :

$\Large \boxed{ \red{\sf { 100 \; m \: s^{-1}}}}$

Explαnαtion:

As per the provided information in the given question, we have :

• Initial velocity (u) = 80 m/s
• Final velocity (v) = 120 m/s
• Time taken (t) = 5 s

We've been asked to calculate average velocity.

Basically, in order to calculate average velocity, o only initial velocity and final velocity are required.

The magnitude of average velocity is given by,

$\implies \underline{\boxed{\red{\sf{ \overline{\nu} = \dfrac{v+u}{2} }}}}$

• $\bf \overline{\nu}$ denotes average velocity.
• v denotes final velocity
• u denotes initial velocity

Insert the values in the formula.

$\implies \sf { \overline{\nu} = \dfrac{80 + 120}{2} \; m \: s^{-1}}$

$\implies \sf { \overline{\nu} =\cancel{ \dfrac{200}{2}} \; m \: s^{-1}}$

$\implies \boxed{ \red{\sf { \overline{\nu} = 100 \; m \: s^{-1}}}}$

∴ The magnitude of the average velocity of the body is 100 m/s.

$\rule{200}2$

Lєαrn Morє :

Average velocity can be calculated using these two formulae :

○ $\sf { Velocity_{(av)} = \dfrac{Total \; Displacement}{Total \; Time} }$

○ $\sf { Velocity_{(av)} = \dfrac{v+u}{2} }$

$\rule{200}2$

Answer 2

Answer:

Answer: FORMULA OF AVERAGE VELOCITY= u+v/2

Step-by-step explanation:

AVERAGE VELOCITY= u+v/2, u is initial velocity, v is final velocity

                                   = 80+120/2

                                   = 200/2

                                   = 100 m/s.

                                      100 m/s is your Answer.

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