Physics please help thanks kinematics?

Posted on 2015-09-21 06:44:00 in Physics by FELICIA

A student walks from her apartment a distance of 248m to the bus stop at a speed of v1= 1.60m/s. then she realizes she has forgotten her crib sheet for her exam and so runs back to her apartment to pick it up and returns to the bus stop at a speed v2= 5.50m/s.
1.. What is the elapsed time since she first left her apartment?
2.. What is her average velocity
3.. What is her average speed

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