Physics Flashcard on Free Fall and Velocity

Front

What is free fall?

Back

Free fall is the motion of an object under the influence of gravitational force only, with no other forces acting on it, such as air resistance.

Front

What is the formula to calculate the height of an object in free fall?

Back

The height (h) can be calculated using the formula h = 0.5 * g * t^2, where g is the acceleration due to gravity (approximately 9.81 m/s²) and t is the time in seconds.

Front

How do you determine the time to reach the peak height of an object thrown vertically?

Back

The time to reach the peak height is half of the total hang-time of the object.

Front

What is the acceleration due to gravity on Earth?

Back

The acceleration due to gravity on Earth is approximately 9.81 m/s².

Front

How do you calculate the final velocity of an object in free fall after a certain time?

Back

The final velocity (v) can be calculated using the formula v = g * t, where g is the acceleration due to gravity and t is the time in seconds.

Front

What is the significance of air resistance in free fall?

Back

Air resistance opposes the motion of falling objects and can affect their velocity and acceleration, but in ideal free fall problems, it is often ignored.

Front

What is the relationship between time and distance in free fall?

Back

In free fall, the distance fallen increases with the square of the time, meaning that the longer an object falls, the greater the distance it covers.

Front

How do you calculate the time it takes for an object to fall a certain distance?

Back

The time (t) can be calculated using the formula t = sqrt(2h/g), where h is the height and g is the acceleration due to gravity.

Front

What is the velocity of an object just before it hits the ground after falling from a height?

Back

The velocity just before impact can be calculated using the formula v = sqrt(2gh), where h is the height fallen and g is the acceleration due to gravity.

Front

What is hang-time in the context of projectile motion?

Back

Hang-time refers to the total time an object is in the air during its ascent and descent.