Question

How long will it take a car to go from a complete stop to 44 km/hr if they are accelerating at 5 km/hr?

Answer 1

Solution :-

Given that ,

• Initial Velocity of car = 44km / hr.
• Final Velocity of car = 0km / hr.
• Acceleration = -5km/hr².

To Find :

• Time taken to stop the car .

So , here use first equⁿ of motion which is ,

`\boxed{\red{\bf\dag v = u + at }}`

where ,

• v is final Velocity.
• u is Initial velocity.
• a is acceleration.
• t is time taken.

Now , substituting the respective values ,

`\tt:\implies v=u+at`

`\tt:\implies 0 = 44 + (-5)t`

`\tt:\implies -44 = -5t`

`\tt:\implies t=(44)/(5)`

`\underline{\boxed{\red{\tt \longmapsto Time\:\:=\:\:8.8hrs.}}}`

`\boxed{\green{\bf\pink{\dag} Hence\:time\:taken\:to\:stop\:the\:car\:is\:8.8hrs.}}`