SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the maximum speed an object can go.
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the maximum velocity an object can fall
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the maximum velocity an object can fall, given its shape
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3.0 x 108 m/s
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Detailed explanation-1: -What is Terminal Velocity? Terminal velocity is defined as the highest velocity attained by an object falling through a fluid. It is observed when the sum of drag force and buoyancy is equal to the downward gravity force acting on the object.
Detailed explanation-2: -The drag coefficient is a dimensionless constant and depends on the shape of the object. Thus different objects would have different terminal velocities depending on their shape and the cross sectional area they present moving through the medium as well as the acceleration due to gravity.
Detailed explanation-3: -At terminal velocity, air resistance equals in magnitude the weight of the falling object. Because the two are oppositely directed forces, the total force on the object is zero, and the speed of the object has become constant.
Detailed explanation-4: -Terminal Velocity is the maximum velocity that an object in free-fall through a medium can achieve. The force of gravity pulling the object down is equal and opposite the drag forces slowing the object.