Concept:Uniform acceleration from rest means the velocity of the body increases steadily from zero at a constant rate.
Explanation:For a body starting from rest, initial velocity is
u=0.
For constant acceleration
a, the velocity after time
t is
v=u+at=at.
Thus
v is directly proportional to
t.
On a velocity–time graph, this produces a straight line that passes through the origin, with a constant positive slope.
The line must start from
v=0 when
t=0 and increase uniformly.
From the diagram, the graph that matches this description is graph A.
Answer:Option D: Graph A.
