Question

6. A car accelerates uniformly from 18 km/hr to 36 km/hr in 5 seconds. Calculate the ​

Answer 1

Answer:

last speed=36-18=18km

acceleration=18/5=3.6 m/s2

Explanation:

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Answer 2

Given :-

• If a car accelerates uniformly from 18 km/hr to 36 km/hr in 5 seconds

To Find :-

• Acceleration

Solution :-

$\dashrightarrow$ 1 km/h = 5/18 m/s

$\dashrightarrow$ 18 km/h = 18 × 5/18

$\dashrightarrow$ 18 km/h = 5 m/s

$\dashrightarrow$ 36 km/h = 36 × 5/18

$\dashrightarrow$ 36 km/h = 2 × 5

$\dashrightarrow$ 36 km/h = 10 m/s

Now,

$\boxed{\sf{Acceleration = Final\: velocity - Initial\: velocity/Time}}$

$\longrightarrow$a = 10 - 5/5

$\longrightarrow$a = 5/5

$\longrightarrow$a = 1/1

$\longrightarrow$a = 1

Therefore

Acceleration is 1 m/s²