Question

A body moves along a straight line with acceleration 3 metres second square for 2 seconds and then with acceleration 4 metre second square for 3 seconds . what is average acceleration??

Answer 1

1/4(I m not sure about the answer .actually I m in class 7 and I have not studies about accerlation in much detail)

Answer 2

$avg \: acceeration \: = \frac{avg \: speed}{total \: time \: taken}$
$avg \: acceeration \: = \frac{ (3 \times 2) + (4 \times 3) }{3 + 2}$
$avg \: acceeration \: = \frac{ 18}{5}$
$avg \: acceeration \: = 3.6m per {s}^{2}$