The local atmospheric pressure in denver, colorado (elevation 1610 m) is 83.4 kpa. air at this pressure and at 25°c flows with a velocity of 13 m/s over a 2.5-m × 5-m flat plate. the dynamic viscosity is independent of pressure, and for air at 25°c, it is μ = 1.849×10-5 kg/m⋅s. the air density at 25°c = 298 k and 83.4 kpa is 0.9751 kg/m3. calculate the drag force acting on the top surface of the plate if the air flows parallel to the 5-m-long side of the plate. the drag force acting on the top surface of the plate if the air flows parallel to the 5-m-long side is n.

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

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