the fig above shows displacement-time graphs for three different motions. which of the following statements is correct?
A.
graph 2 corresponds to the highest velocity
B.
graph 1 corresponds to zero velocity
C.
graph 3 corresponds to a particle moving in the negative x direction
D.
graph 2 corresponds to a particle moving in the positive x direction
Correct answer is B
At constant velocity, an object must have a constant speed in a constant direction. Constant direction constrains the object to motion in a straight path thus, a constant velocity means motion in a straight line at a constant speed.