Based on the graph, how would you describe the motion of the object?

a) zero velocity, zero acceleration

b) positive velocity, zero acceleration

c) positive velocity, positive acceleration

d) constant velocity, positive acceleration

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?