Time(s) | 2 | 4 | 6 | 8 | 10 | 12 | 14 |
Velocity (m/s) | 5 | 10 | 15 | 20 | 20 | 10 | 0 |
Answer:
(a) The following table shows
some differences between distance and displacement.
(b) Yes, an object which has
moved through a distance can have zero displacement. Suppose a person throws a
ball upwards through a height hand catches back the ball. Then, distance covered
by the ball = h + h = 2h
Displacement of the ball = 0.
(1)
(c)
(1/2)
Acceleration,
(1/2)
Or
(1)
(a) In time (0-2) s, motion is
not defined. From 2 to 6 seconds, the motion is uniform. (1)
(b)
It is constant during this
time. (1)
(c) Area below the graph in' 6
to 8 seconds, gives distance.
(1)
(d) Retardation
(1)
S. No.
Distance
Displacement
(i)
Distance is the length of actual path
travelled by a body, irrespective of its direction of motion.
Displacement is the shortest distance
between the initial and final positions of a body in a given direction.
(ii)
Distance between tow given points may
be the same or different for different paths chosen.
Displacement between two given points
is always same.
(iii)
It is a scalar quantity.
It is a vector quantity.
(iv)
Distance covered is always positive or
zero.
Displacement covered may be positive,
negative or zero.
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