Question

The displacement time graph of a moving particle is shown belowThe instantaneous velocity of the particle is negative at the point(a) D (b) F(c) C (d) E

Answer 1

Answer:

D) E

Explanation:

If we will draw a tangent of the point then ot will make angle x with t. Since only the shortest angle will be taken, thus it will also make 180-x.Since we now know that the slope= tan x, thus the slope at E = tan(180-x) =-tanx, thus the instantaneous velocity at E is negative

In the given question C and F have a positive slope so instantaneous velocity is positive. Since point  D has zero slope so instantaneous velocity is zero but E has negative so instantaneous velocity is negative at E.

Answer 2

Explanation:

slope of displacement time graph gives instantaneous velocity

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