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

What is the acceleration due to gravity on Earth?

Back

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

Front

What is the initial velocity (v_i) of an object in free fall when it is dropped from rest?

Back

The initial velocity (v_i) of an object in free fall when dropped from rest is 0 m/s.

Front

Which kinematic equation can be used to calculate the final velocity (v_f) of an object in free fall?

Back

The kinematic equation v_f = v_i + at can be used, where 'a' is the acceleration due to gravity.

Front

What is the effect of air resistance on free fall?

Back

Air resistance opposes the motion of falling objects, but in ideal free fall scenarios, it is often ignored.

Front

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

Back

The time can be calculated using the equation d = v_it + 0.5at², where 'd' is the distance fallen.

Front

What is the final velocity of an object in free fall after falling for 3 seconds?

Back

Using v_f = v_i + at, the final velocity after 3 seconds is v_f = 0 + (9.81 m/s²)(3 s) = 29.43 m/s.

Front

What is the significance of the height from which an object is dropped in free fall?

Back

The height affects the time of fall and the final velocity upon impact, as higher drops result in longer fall times and greater speeds.

Front

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

Back

The formula is d = v_it + 0.5at², where 'd' is the distance, 'v_i' is the initial velocity, 'a' is the acceleration, and 't' is the time.

Front

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

Back

The distance fallen increases with the square of the time, as described by the equation d = 0.5at².