A car travels in a straight line for 2.7 h at a
constant speed of 71 km/h .
What is its acceleration?
Answer in units of m/s

Question

A car travels in a straight line for 2.7 h at a
constant speed of 71 km/h .
What is its acceleration?
Answer in units of m/s

anonymous · Answer

how is acceleration defined ?

anonymous · Answer

A=difference in distance/difference in time
I think it would be easier to convert your dimensional analysis (km/h to m/s) first.
once it's converted, just plug your numbers into the formula.

anonymous · Answer

No, the above is the definition of average speed, you need the definition of acceleration.

anonymous · Answer

whoops! change the 'difference in time' to just time

anonymous · Answer

sorry, that still doesn't define acceleration

anonymous · Answer

Change in velocity divided by time, yes?

anonymous · Answer

I apologize Malahet, I feel silly now. Thanks for being patient ProfBrainstorm

anonymous · Answer

0 m/s^2

anonymous · Answer

accelaration is defined as change in velocity which can be either in magnitude or in direction. now as defined in the question neither the magnitude
 nor the direction is changing therefore the accelaration is 0ms^-2

emmatassone · Answer

there is no acceleration because speed is constant, if there isnt change in speed there wont be acceleration:$$a=\frac{ dv }{ dt }$$