At its peak, a tornado is 60.0 m in diameter and carries 500 km/h winds. what is its angular velocity in revolutions per second?

The speed of the winds corresponds to the tangential velocity of the tornado. Let's convert it into m/s:

The diameter of the tornado is , so its radius is

The angular velocity is related to the tangential velocity by:

And keeping in mind that 1 revolution corresponds to radians, we find the angular velocity in revolutions per second:

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.