Question

a bicycle increase its speed from 10km / h to 15km/h in 6 sec . calculate its acceleration​

Answer 1

V=15 km/hr(final speed)

U=10km/hr(initial speed)

t=6seconds

According to Newton's law

V=U+a×t

15km/hr=10km/hr+a×6sec

5 km/hr=a×6sec

5×18/5 m/s=a×6sec

a=18/6 m/s^2

A=3 m/s^2 answer

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Answer 2

Answer :

➥ The acceleration of a bicycle = 0.23 m/s²

Given :

➤ Intial velocity of a bicycle = 10 km/h

➤ Final velocity of a bicycle = 15 km/h

➤ Time taken (t) = 6 sec

To Find :

➤ Acceleration of a bicycle (a) = ?

Solution :

◈ Intial velocity (u) = 10 km/h = 2.77 m/s

◈ Final velocity (v) = 15 km/h = 4.16 m/s

Acceleration of a bicycle

Acceleration is given by

$\tt{: \implies a = \dfrac{v - u}{t} }$

$\tt{: \implies a = \dfrac{4.16 - 277}{6} }$

$\tt{: \implies a = \cancel{\dfrac{1.39}{6}}}$

$\bf{: \implies \underline{ \: \: \underline{ \purple{ \: \: a = 0.23 \: m/s^2 \: \: }} \: \: \: }}$

Hence, the acceleration if a bicycle is 0.23 m/s².

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Additional Information :

What is acceleration ?

➜ Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.

What is Instantaneous acceleration ?

➜ The ratio of change in velocity during a given time interval such that the time interval goes to zero.

What is the formula of acceleration ?

➜ $\sf{a = \dfrac{v - u}{t} }$

➜ $\sf{\dfrac{Change\: in\: velocity }{time}}$

➜ $\sf{a = \dfrac{v_{f} - u_{i}}{t}}$

Where,

• a is the acceleration
• v is final velocity
• u is intial velocity
• t is time taken
• $\sf v_{f}$ is final velocity
• $\sf u_{i}$ is intial velocity

What is the SI unit of acceleration ?

➜ The SI unit of acceleration is m/s².