A body falls freely. Which physical quantity is correct.
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Acceleration due to gravity
kiya7:
R u sure
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hala mate,
Force : remains constant (if we neglect the air drag force acting upwards and consider only the gravitational force acting downwards.)
Acceleration : remains constant (if the net force is constant and height of release is not comparable with radius of Earth ) a = g = 9.8 m/s2
Velocity : is variable under the action of constant acceleration (g) downwards velocity increases and is linear function of time( t) given as : v = u + at (Second Equation of Motion)
Mass: is constant mass of any object varies during motion only and only if body does not move with speed comparable to speed of light.
Momentum : is variable ( as momentum is defined as product of mass and velocity. )
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