Answer:
Ans(a). CD is the region for which the car is at rest.
Ans(b). BC is the region for which the car will maintain uniform motion.
Explanation:
[We will observe each region of the graph]
For Region AB:
This region is parabola opening upward which implies distance is directly proportional to the square of time.
So, for region AB the motion will neither be at rest nor be uniform motion.
For Region BC:
This region is a straight line at 45° from the time-axis which implies that distance is directly proportional to time.
So, for region BC the motion will be uniform as equal distance would be covered in equal interval of time.
For Region CD:
This region is a horizontal line parallel to the time axis which implies that there is no change in distance with respect to time.
So, for region CD there is no motion because there is no change in position. Therefore, car is at rest .
For Region DE:
This region is a parabola opening upward which implies that distance is directly proportional to time square .
So, for this region DE there won't be uniform motion or at rest.
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Verified answer
Answer:
Ans(a). CD is the region for which the car is at rest.
Ans(b). BC is the region for which the car will maintain uniform motion.
Explanation:
[We will observe each region of the graph]
For Region AB:
This region is parabola opening upward which implies distance is directly proportional to the square of time.
So, for region AB the motion will neither be at rest nor be uniform motion.
For Region BC:
This region is a straight line at 45° from the time-axis which implies that distance is directly proportional to time.
So, for region BC the motion will be uniform as equal distance would be covered in equal interval of time.
For Region CD:
This region is a horizontal line parallel to the time axis which implies that there is no change in distance with respect to time.
So, for region CD there is no motion because there is no change in position. Therefore, car is at rest .
For Region DE:
This region is a parabola opening upward which implies that distance is directly proportional to time square .
So, for this region DE there won't be uniform motion or at rest.