The graph is a hoirzontal line. Velocity is zero.

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The graph is a hoirzontal line. Velocity is zero.
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The slope gt 0 (positive). The object is moving
towards the end position
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The slope lt0 (negative). The object is moving
towards the start position
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Speed or velocity is at middle instant of the
time interval.
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Constructing Speed time graph or velocity time
graph
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Construct from a distance-time graph (or a
displacement-time graph)
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Displacement and v-t graph

• The following slides show you the relationship
  between displacement (S) and the v-t graph
  (velocity-time graph)

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area under the graph?
Graph
area under the graph from t 0.1s to 0.2s is the
distance travelled during t0.1s to 0.2s
Area 0.6 x (0.2- 0.1) Area speed x time
distance
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Displacement travelled by the object from time
t1 to t2 area A
V1
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The area under v-t graph
Displacement due to the increase of velocity
from v1 to v2 from t1 to t2
Displacement due to v1 from t1 to t2
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y mx
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no s
no v
no a
no t
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u ,
v ,
a
s
can be or -
depend on direction
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Case 1
t 3s
u 1ms-1
v 4ms-1
a ?
Case 2
t 5s
v - 4ms-1
u 1ms-1
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