An object travels North at #7 m/s# for #5 s# and then travels South at #9 m/s# for # 2 s#. What are the object's average speed and velocity?
1 Answer
May 13, 2016
Explanation:
For 1st 5s the velocity of the object towards North be
For 1st 5s the displacement of the object towards North be
For 2nd 2s the velocity of the object towards Southbe
For 2nd 2s the displacement of the object towards Southbe
Net displacement during t=(5+2)=7s is
Hence the Net Velocity
Total distance covered during 7 s
Hence Average speed