Physics: Acceleration and Freefall Flashcard

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object with respect to time, measured in meters per second squared (m/s²).

Front

What is the formula to calculate acceleration?

Back

Acceleration (a) can be calculated using the formula: a = (final velocity - initial velocity) / time.

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.

Front

What is the acceleration due to gravity on Earth?

Back

The acceleration due to gravity on Earth is approximately 9.8 m/s².

Front

How does air resistance affect free fall?

Back

Air resistance opposes the motion of falling objects, causing them to fall slower than they would in a vacuum.

Front

What happens to the velocity of an object thrown upward?

Back

The velocity decreases as it rises, reaches zero at the peak, and then increases as it falls back down.

Front

What is the velocity of an object in free fall after 2 seconds?

Back

The velocity can be calculated using the formula: v = g * t, where g is 9.8 m/s². After 2 seconds, v = 9.8 m/s² * 2s = 19.6 m/s.

Front

What is terminal velocity?

Back

Terminal velocity is the constant speed an object reaches when the force of gravity is balanced by air resistance.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity representing how fast an object is moving, while velocity is a vector quantity that includes direction.

Front

What is the significance of the slope of a velocity-time graph?

Back

The slope of a velocity-time graph represents acceleration.