"Stationary" means zero speed. The object's speed is not changing, and the direction of the speed is obviously also not changing.
By definition then, acceleration is zero.
The area under an acceleration-time graph is equal to the object's velocity (not change in velocity).
No, but it is possible to not have an increase in speed. Because velocity is a directional quantity, not a scalar one, an object in freefall (by definition within a gravity field) is always under acceleration, just not necessarily one that alters its speed or even its position. Objects in orbit around a planet are in freefall (hence weightlessness) where the tangential component of their forward motion opposes the pull of gravity.
For example, you can time how long it takes for an object to reach the floor. You also need to measure how far it falls down. If you assume constant acceleration, there is only one possible acceleration for any possible set of measurements.
A submarine deep in the ocean is under great pressure, and a space capsule outside the atmosphere is under zero pressure. Both of them are capable of high acceleration, zero acceleration, and anything in between. The pressure is irrelevant.
free fall.
The free fall acceleration of an object under Earth's gravity is directed downward, towards the center of the Earth. This acceleration is constant at approximately 9.81 m/s^2 on the surface of the Earth.
Some common acceleration problems that students encounter in physics include calculating the acceleration of an object given its initial and final velocities, determining the acceleration of an object moving along a curved path, and analyzing the acceleration of an object under the influence of friction or other external forces.
The formula for calculating the velocity of an object falling freely under gravity, considering the acceleration due to gravity as 2g, is v (2gh), where v is the velocity, g is the acceleration due to gravity, and h is the height from which the object falls.
Yes, when an object changes speed, its acceleration changes. Acceleration is a measure of how quickly the speed of an object changes over time. So, if the speed changes, the acceleration of the object will also change.
Common acceleration problems in physics include calculating the acceleration of an object given its initial and final velocities, finding the acceleration of an object moving along a curved path, and determining the acceleration of an object under the influence of external forces like friction or gravity. These problems can be solved using equations of motion, Newton's laws of motion, and principles of kinematics. By analyzing the forces acting on the object and applying the appropriate formulas, one can determine the acceleration of the object in various scenarios.
From the time the object leaves your hand, its acceleration doesn't change at all ... it remains constant at 9.8 meters (32.2 feet) per second2 downward. Well, we have to admit that the acceleration does change to zero once the object hits the ground.
Vf = Vi + at Where Vf = final velocity Vi = initial velocity a = acceleration t = time