Question

calculate the acceleration of a bus traveling with a velocity of 15m-¹ which then slows down to attain a velocity of 7m-¹ in 2 s.​


Fôr _______

nrb-jixr-dne​

Answer 1

Answer:

-4m/s²

Step-by-step explanation:

a = v - u / t

= 7 - 15 / 2

= -8 / 2

a = -4m/s²

Hope it helps you

Answer 2

Answer:

Question:

Calculate the acceleration of a bus traveling with a velocity of 15 m/s which then slows down to attain a velocity of 7 m/s in 2 s.

Answer:⤵️

Acceleration of a bus is -4 m/s².

Explanation:

Given that:

Initial velocity (u) = 15 m/s

Final velocity (v) = 7 m/s

Time taken (t) = 2 s

To Find:

Acceleration (a)?

Solution:

Using first equation of motion ::

We know that,

⧪ $\boxed{\bf{\purple{v = u + at}}}$ ⧪

Where,

v denotes final velocity

u denotes initial velocity

a denotes acceleration

t denotes time taken

According to the question by using the formula we get,

➼ $\sf 7 = 15 + (a\:\times\:2)$

➼ $\sf 7 - 15 = 2a$

➼ $\sf 2a = -8$

➼ $\sf a = {\cancel{\dfrac{-8}{2}}}$

➼ $\bf\pink{a = -4\:m/s^2}$

∴ Acceleration of a bus is -4 m/s².

Learn More:

$\clubsuit$ Three equations of motion :

v = u + at ㅤㅤㅤㅤㅤ[Used above]

s = ut + ½ at²

v² = u² + 2as

$\clubsuit$ Some important definitions :

Acceleration

Acceleration is the process where velocity changes. Since, velocity is the speed and it has some direction. So, change in velocity is considered as acceleration.

Initial velocity

Initial velocity is the velocity of the object before the effect of acceleration.

Final velocity

After the effect of acceleration, velocity of the object changes. The new velocity gained by the object is known as final velocity.

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