An object of mass 30KG is falling in air and experiences a force due to air resistance of 50 newtons determine the net force acting on the object end and calculate the acceleration of the object use newtons law pleaes!

Assume that . The net force on this object will be (downwards.) The acceleration of this object will be approximately (also downwards.)

Explanation:

The object is falling towards the ground because of gravity. The size of the gravitational force on this object depends on its mass and the strength of the gravitational field at its location.

Near the surface of the earth, the gravitational field strength is approximately . In other words, approximately of gravitational force acts on each kilogram of mass near the surface of the earth.

The mass of this object is given as . Therefore, the size of the gravitational force on it will be:

.

Near the surface of the earth, gravitational forces point towards the ground. On the other hand, the direction of air resistance on this object will be opposite to its direction of motion. Since this objects is moving towards the ground, the air resistance on it will be directed in the opposite direction. That's exactly the opposite of the direction of the gravitational force on this object. The net force on this object will be:

.

Let denote the acceleration on this object. Apply Newton's Second Law of motion:

.

Note that the acceleration of this object and the net force on it should be in the same direction.

explanation: in any substance/object, the particles inside it (atoms/molecules) constantly move in random directions and with random speeds (this motion is called brownian motion). as a result, the particles have some kinetic energy (which is proportional to the temperature of the substance).

explanation:

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