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In your everyday life, you come across a range of motions in which
$(a)$ acceleration is in the direction of motion.
$(b)$ acceleration is against the direction of motion.
$(c)$ acceleration is uniform.
$(d)$ acceleration is non$-$uniform.
Can you identify one example each of the above type of motion ?
Solution
$(a)$ When the speed of a car on a road increases. the acceleration of the car is in the direction of motion.
$(b)$ When brakes are applied to a car in motion, its speed decreases. The acceleration produced in the car is against the direction of motion.
$(c)$ When a body is falling freely under the action of gravity, it has a uniform acceleration $g=9.8 m s ^{-2}$
$(d)$ When a car is passing through city limits on a highway, its acceleration $/$ retardation is non$-$uniform depending on the volume of traffic.
