Unit 3.5 Free Fall

Front

What is free fall?

Back

Free fall is the motion of an object under the influence of gravitational force only, without any air resistance.

Front

Do heavier objects fall faster than lighter objects in free fall?

Back

No, all objects fall at the same rate in free fall regardless of their mass, assuming no air resistance.

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

If a ball is dropped from rest, what is its initial velocity (v_i)?

Back

The initial velocity (v_i) of a dropped ball is 0 m/s.

Front

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

Back

v_f = v_i + (g * t), where g is the acceleration due to gravity (9.8 m/s²).

Front

What is the formula to calculate the distance (d) fallen in free fall?

Back

d = v_i * t + 0.5 * g * t².

Front

What happens to the velocity of an object in free fall as time increases?

Back

The velocity of an object in free fall increases as time increases due to the constant acceleration of gravity.

Front

What is the velocity of an object after 6 seconds of free fall?

Back

The velocity after 6 seconds is approximately 60 m/s (using v_f = g * t).

Front

What is the significance of air resistance in free fall?

Back

Air resistance opposes the motion of falling objects and can affect their acceleration and terminal velocity.

Front

What is terminal velocity?

Back

Terminal velocity is the constant speed an object reaches when the force of air resistance equals the force of gravity, resulting in no net acceleration.