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7. MOTION
medium
Account for the following
$(a)$ Name the quantity which is measured by the area occupied below the velocity$-$time graph.
$(b)$ An object is moving in a certain direction with acceleration in the perpendicular directions.
$(c)$ Under what condition is the magnitude of average velocity of an object equal to its average speed ?
$(d)$ An example of uniformly accelerated motion.
$(e)$ A body is moving along a circular path of radius
$(r)$. What will be the distance and displacement of the body when it completes half revolution ?
Option A
Option B
Option C
Option D
Solution
$(a)$ Distance.
$(b)$ Motion of satellite or motion along a circular path.
$(c)$ When distance and displacement are equal.
$(d)$ The motion of a freely falling body.
$(e)$ Distance $=2 \pi r,$ Displacement $=2 r$.
Standard 9
Science
