Question

A car is travelling at 20 km/h, it speeds upto 60 km/h in 6 seconds. What is its acceleration?

Answer 1

Answer:

$\sf{a = 1.85ms^{-2}}$

Explanation:

Given :

• Initial velocity,u=> 20km/h = 20*1000/60*60 = 5.5
• Final velocity,v=> 60km/h = 60*1000/60*60 = 16.6
• Time,t=> 6 seconds

To Find :

• Acceleration,a

Solution :

We know that :-

$\sf{v=u+at}$

Put their values and solve it

$\Rightarrow \sf{16.6=5.5+a\times 6}$

$\Rightarrow \sf{16.6-5.5 =6a}$

$\Rightarrow \sf{11.1 =6a}$

$\Rightarrow \sf{\dfrac{11.1}{6}=a}$

$\Rightarrow \sf{a = 1.85ms^{-2}}$

Therefore acceleration is 1.85ms^-2

Answer 2

Answer

1.85m/s^2

Explanation: