*HOTS QUESTIONS*
*MOTION*
1. A body moves from point *A to point B* ,travelling some distance with speed 60 km/hr then it moves back from *B to A* with speed 40 km/hr. Find displacement ,distance covered, average velocity and average speed for whole journey.
2. An object moves in a circular path of radius 1 metre with uniform speed and takes 4 seconds to complete the circular path. Find distance, displacement, average speed and average velocity for:
a) A to B
b) A to C
c) A to D
d) A to A
With appropriate diagram.
Answers
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Answer:
1.Let distance from A to B=x km= distance from B to A.
Time taken by body from A to B =
60
x
hr
Time taken by body from B to A =
80
x
hr
Total time taken by body =
60
x
+
80
x
=
240
7x
hr
average speed=
total time
total distance
=
240
7x
2x
=
7
480
km h
−1
Explanation:
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