Physics
How is the velocity obtained from the displacement-time graph for a body moving with a varying speed in a fixed direction?
Answer
If a body moves with varying speed in a fixed direction i.e., with variable velocity, the displacement-time graph is not a straight line, but it is a curve. The velocity at any instant can then be obtained by finding the slope of the tangent drawn on the curve at that instant of time.
Related Questions
The figure shows displacement-time graph of two vehicles A and B moving along a straight road. Which vehicle is moving faster? Give reason.
What can you say about the nature of motion of a body if its displacement-time graph is —
(a) a straight line parallel to time axis?
(b) a straight line inclined to the time axis with an acute angle?
(c) a straight line inclined to the time axis with an obtuse angle?
(d) a curve
Draw a velocity-time graph for a body moving with an initial velocity u and uniform acceleration a. Use this graph to find the distance travelled by the body in time t.
State the type of motion represented by the following sketches in the figure.
Give example of each type of motion.
(a)
(b)
