In a two-dimensional motion, instantaneous speed $$v_0$$ is a positive constant. Then which of the following is necessarily true?

 1 the average velocity is not zero at any time. 2 average acceleration must always vanish. 3 displacements in equal time intervals are equal. 4 equal path lengths are traversed in equal intervals.
Subtopic: Â Speed & Velocity |
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The following are four different relations about displacement, velocity and acceleration for the motion of a particle in general.

 (a) $$v_{a v}=1 / 2\left[v\left(t_1\right)+v\left(t_2\right)\right]$$ (b) $$v_{{av}}={r}\left({t}_2\right)-{r}\left({t}_1\right) / {t}_2-{t}_1$$ (c) $$r=1 / 2\left[v\left(t_2\right)-v\left(t_1\right)\right]\left({t}_2-{t}_1\right)$$ (d) $${a}_{{av}}=v\left({t}_2\right)-v\left({t}_1\right) / {t}_2-{t}_1$$

The incorrect alternative/s is/are:

 1 (a), (d) 2 (a), (c) 3 (b), (c) 4 (a), (b)
Subtopic: Â Speed & Velocity |
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