Motion

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Motion is the change in position of an object with time. Examples: (1) A car moving on the road, (2) Birds flying in the sky, (3) Blood flowing through veins and arteries, (4) A person walking in the …

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Distance is the total path length covered by an object. It is a scalar quantity (only magnitude). Displacement is the shortest distance measured from initial to final position of an object in a specif…

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Yes, the magnitude of displacement equals distance only when an object moves in a straight line in one direction without changing its path. In all other cases (curved path, back-and-forth motion), dis…

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Uniform motion occurs when an object covers equal distances in equal intervals of time. The speed remains constant throughout the motion. Example: A car traveling at constant 60 km/h on a straight hig…

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Non-uniform motion occurs when an object covers unequal distances in equal intervals of time. The speed keeps changing throughout the motion. Example: A car moving in city traffic, sometimes fast, som…

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Speed is the distance travelled by an object per unit time. It tells us how fast an object is moving. Formula: Speed = Distance/Time or v = s/t. SI unit: metre per second (m/s or ms⁻¹). Other units: k…

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Average speed is the total distance travelled divided by the total time taken. It gives the overall rate of motion for the entire journey. Formula: Average speed = Total distance travelled / Total tim…

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Velocity is the speed of an object moving in a definite direction. It is displacement per unit time. Differences from speed: (1) Velocity has direction, speed doesn't, (2) Velocity can be negative, sp…