Question

assertion- if a car is travelling south on a straight road and its break are aplied, it will accelerate towards north reason- acceleration is scalar quantity​

Answer 1

Answer:

Incorrect reason

 'Acceleration is vector quantity'

Explanation:

Even the question says 'accelerate towards North' which means 'acceleration has a direction  and  surely a magnitude'.  

Scalar quantities don't have directions.  

Therefore, 'acceleration is not a scalar quantity'.

  Moreover, 'acceleration is a vector quantity, having direction'

Acceleration is in North because:

  The car's velocity is decreasing in South,  so it has a negative acceleration in South(which is called de-acceleration) .

   But since velocity is directional, 'velocity can be said increasing in North direction,  following there is an positive acceleration in North'

Answer 2

Answer:

$\large{\bf{\green{\mathfrak{\dag{\underline{\underline{Question:-}}}}}}}$

1. Assertion: -If a car travelling south on a straight road and its breaks are applied it will accelerate towards north reason -acceleration is scaler quantity.

$\large{\bf{\red{\mathfrak{\dag{\underline{\underline{Solution:-}}}}}}}$

• First verify the given question then we can explain it .

• In the question given that the car is travelling south on a straight road and it will accelerate towards north reason - acceleration is a scaler quantity.

$\large{\bf{\green{\mathfrak{\dag{\underline{\underline{Answer :-}}}}}}}$

• The assertion is wrong .
• Here one thing we know that acceleration is not a scaler quantity but its a vectors quantity.
• Here scaler quantities does not have any direction

Therefore ,

• Acceleration is in north direction
• which we can tell it as decrease in speed or rate (Negative acceleration or retardation)
• Hence we know velocity is directional.

Hope it helps u mate.

Thank you .