Question

a car accelerates uniformly from 18 km per hr to 36 km per hr in 5 min find the acceleration​

Answer 1

GIVEN :–

• Initial velocity (u) = 18 km/hr = 18 × (5/18) m/s = 5 m/s

• Final velocity (v) = 36 km/hr = 36 × (5/18) m/s = 10 m/s

• Time = 5 min = 5 × 60 = 300 sec.

TO FIND :–

• Acceleration = ?

SOLUTION :–

• We know that –

$\\ \bf \implies \large{ \boxed{ \bf v = u + at}}$

• Now put the values –

$\\ \bf \implies 10 = 5 + a(300)$

$\\ \bf \implies 5 + a(300) = 10$

$\\ \bf \implies a(300) = 10 - 5$

$\\ \bf \implies a(300) = 5$

$\\ \bf \implies a= \cancel \dfrac{5}{300}$

$\\ \bf \implies a= \dfrac{1}{60}$

$\\\bf \implies \large { \boxed{ \bf Acceleration= \dfrac{1}{60} \:\:\dfrac{m}{ {s}^{2}}}}$

☆ OTHER FORMULAS :–

$\\ \: \: \bf (1.) \: \: \large v = u + at \: \:$

$\\ \: \: \bf (2. )\: \: \large s = ut + \dfrac{1}{2} a{t}^{2} \: \:$

$\\ \: \: \bf (3. ) \: \: \large {v}^{2} = {u}^{2} +2as\: \:$

Answer 2

⭐ GIVEN ⭐

• Initial Velocity = 18km/hr = 5m/s

• Final Velocity = 36km/hr = 10m/s

• Time = 5 minutes.

⭐ TO FIND ⭐

• Acceleration Of Car.

⭐ SOLUTION ⭐

We know that,

a = v-u/t.

Here,

a = Acceleration,

v = Final Velocity,

u = Initial Velocity,

t = time.

So, We Can Apply this Formula to find the acceleration.

So,

➠ a = 10-5/5

➠ a = 5/5.

➠ a = 1 m/s²

Hence, Acceleration Of Car = 1m/s².