Question

A car string form rest and moving with uniform acceleration attains a speed of 60km/h in 20 minutes. find its acceleration km/h?​

Answer 1

Given :-

• Initial velocity = 0 km/hr
• Final velocity = 60 km/hr
• Time taken = 20 mins = 20/60 km/hr = 1/3 hr

To Find :-

• Acceleration ( in km/hr )

Solution :-

• u = 0
• v = 60 km/hr
• t = 1/3 hr

Substituting the value in formula :-

➩ $\rm a = \dfrac{v-u}{t}$

ㅤ

➩ $\rm a = \dfrac{60-0}{\frac{1}{3}}$

ㅤ

➩ $\rm a = \dfrac{60}{\frac{1}{3} }$

ㅤ

➩ $\rm a = 60 \times 3$

ㅤ

➩ $\rm a = 180$

Acceleration = 180 km/hr

Answer 2

Answer:

Here we can use the formula as

v=u+at

here v is final velocity.

u is initial velocity.

a is acceleration.

t is the time.

Now

v is 60km/h

u is 0km/h

t is 20min

a is x

60=0+20x

20x=60-0

20x=60

X =60/20

X = 3

Therefore acceleration is 3km/h.

I hope you got your answer and understood that.

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