Free Fall Flashcard

Front

What happens to the velocity of an object in free fall as it rises?

Back

The velocity decreases.

Front

How long does it take for an object to return to its starting point if it takes 100 seconds?

Back

100 seconds.

Front

When are you undergoing acceleration in a car?

Back

You are undergoing acceleration at all times when the car is changing speed or direction.

Front

What is the speed of an object dropped from a height of 300 meters when it hits the ground, ignoring air resistance?

Back

76.68 m/s.

Front

At maximum height, which of the following quantities is zero for a ball thrown vertically upward? (I) Displacement (II) Velocity (III) Acceleration

Back

II only (velocity is zero at maximum height).

Front

What is the acceleration due to gravity near the surface of the Earth?

Back

Approximately 9.81 m/s².

Front

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

Back

Final velocity (v) = initial velocity (u) + acceleration (a) * time (t).

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 air resistance in free fall?

Back

Air resistance opposes the motion of falling objects, affecting their acceleration and terminal velocity.

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.