What is the drag force of a falling object?
The drag force depends on the square of the velocity. So as the body accelerates its velocity and the drag increase. It quickly reaches a point where the drag is exactly equal to the weight. When drag is equal to weight, there is no net external force on the object, and the acceleration becomes zero.
How do you calculate the drag force of a falling object?
The net external force is equal to the difference between the weight and the drag forces (F = W – D). The acceleration of the object then becomes a = (W – D) / m . The drag force depends on the square of the velocity. So as the body accelerates its velocity (and the drag) will increase.
What is the graph of free falling object?
Representing Free Fall by Position-Time Graphs As learned earlier, a curved line on a position versus time graph signifies an accelerated motion. Since a free-falling object is undergoing an acceleration (g = 9.8 m/s/s), it would be expected that its position-time graph would be curved.
What is meant by free fall motion?
An object that is moving only because of the action of gravity is said to be free falling and its motion is described by Newton’s second law of motion. The acceleration is constant and equal to the gravitational acceleration g which is 9.8 meters per square second at sea level on the Earth.
How do you calculate drag force from drag coefficient?
The drag coefficient Cd is equal to the drag D divided by the quantity: density r times half the velocity V squared times the reference area A. The drag coefficient then expresses the ratio of the drag force to the force produced by the dynamic pressure times the area.
Which graph indicates the motion of freely falling stone?
So , Graph (3) indicates the motion of freely falling stone.
Does speed increase in free fall?
Without the effects of air resistance, the speed of an object free falling toward Earth would increase by about 32 ft (9.8 m) per second every second. A skydiver’s speed will continue to increase until the pull of gravity equals the air resistance pushing against them (or until they deploy their parachute).
What is the only force that can act on an object in free fall quizlet?
The only force acting on an object during free fall is gravity.