Motion along a
Straight Line
The above
diagram shows the positions and directions of motion of two objects,
P and Q.
A
and B are two fixed points on a straight line where AB =
15 m. Object P passes the fixed point A and object Q
passes the fixed point B simultaneously.
The velocity of
P, VP ms-1 is given by VP
= 2t-8 where t is the time, in seconds, after it passes A while
Q passes B with a velocity of VQ =
5-t after it passes B.
(Assume that the
positive direction of motion is towards the right.)
Find
a)
the distance, in m , between P and Q
when P stops
instantaneously. (3 marks)
b)
the time , in seconds when P and Q meet.
(4
marks)
c)
the distance from A ,in m, when P and Q
meet
.
(3
marks)
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