27. Derive the equations=ut.. using a speed-time graph
28 .Draw the distance-time graphs of two bodies A and B starting from rest with uniform speeds with moving
29. For a body moving along a circular path, show that
Linear speed = Angular velocity * Radius of the circle.
Answers
Answer:
28.The distance time graph of two bodies A and B starting from rest with A moving faster than B can be drawn by following steps.
Since both start from rest, assuming to be from the same point, the starting point will be origin.
We know Speed = distance/time.
Since speed is uniform, distance/time = constant.
, the slope is constant.
Since A is faster, A will travel more distance at a particular time. That is graph of A will always lie above B.
Keeping these things in mind the graph will be as in the attachment.
From the figure its clear that . That is A travels more than B at a particular time.
29. consider a particle performing uniform circular motion in anticlockwise sense, along a circle of radius r as shown in fig. . In a very small time interval delta t , the particle moves from point A to B through a distance delta S and it's angular position changes by delta .