Question

a car starts from rest and have uniform acceleration of 2 m/s find the speed of the car after 5 sec.

Answer 1

Given

A car starts at rest and has a uniform acceleration of 2 m/s²

To Find

The speed of the car after 5 sec

Solution

We know that

$\red{\sf \longrightarrow v=u+at}$

Here

• v = Final velocity
• u = Initial velocity
• a = Acceleration
• t = Time

Units

• v = m/s
• u = m/s
• a = m/s²
• t = sec (s)

According to the question

We are asked to find he speed of the car after 5 sec

Therefore

We must find "v"

Given that

A car starts at rest and has a uniform acceleration of 2 m/s²

The speed of the car after 5 sec

Hence

• u = 0 m/s [starts from rest]
• a = 2 m/s²
• t = 5 sec

Substituting the values

We get

$\sf \longrightarrow v=0+2 \times 5 \ m/s$

$\sf \longrightarrow v=2 \times 5 \ m/s$

Therefore

$\pink{\sf \longrightarrow v=10 \ m/s}$

Hence

Final velocity = 10 m/s

So

The speed of the car after 5 sec is 10 m/s

Answer 2

Answer:

$\large{\red{\bold{\underline{Given :-}}}}$

➤ A car starts from rest and have uniform acceleration of 2m/s² .

$\large{\red{\bold{\underline{Find\: Out :-}}}}$

➤ How much speed of the car after 5 secs .

$\large{\red{\bold{\underline{Formula\: Required :-}}}}$

➤ $\large\green{\underline{{\boxed{\textbf{v\: =\: u\: +\: at}}}}}$

【 Where, v = Final Velocity, u = Initial Velocity, a = Acceleration, t = Time 】

$\large{\red{\bold{\underline{Solution :-}}}}$

➤ Given in the question that :-

• Initial Velocity = 0 m/s
• Acceleration = 2 m/s²
• Time = 5 secs
• Final Velocity = ?

Now, we have to substitute the values,

➠ v = 0 + 2(5)

➠ v = 0 + 10

➲ v = 10 m/s

Therefore, the speed of the car after 5 secs is 10 m/s .