Physics

Problem

A cart moves such that its velocity remains constant at

6\,\text{m/s}

for the first

4\,\text{s}

and then increases uniformly to

14\,\text{m/s}

in the next

3\,\text{s}

. Find the total displacement covered in the entire

7\,\text{s}

. a)

63\,\text{m}

60\,\text{m}

54\,\text{m}

66\,\text{m}