Free-Fall Review

Front

What force do free-falling objects fall under the influence of?

Back

Force of gravity.

Front

What does the value g = -9.8 m/s² represent?

Back

The acceleration due to gravity on Earth.

Front

Calculate the maximum vertical height reached by a coin if it is tossed upward at a velocity of +20 m/s.

Back

+20 m.

Front

If a free-falling object takes 10s to travel upward, what is the total time the object is in the air?

Back

20s because of symmetry; T_up = 10s, T_down = 10s, so T_total = 20s.

Front

How long is a coin in the air if it is tossed upward at a rate of +20 m/s?

Back

4 s.

Front

What is the formula for calculating the height of an object in free fall?

Back

h = v_i * t + 0.5 * g * t², where h is height, v_i is initial velocity, g is acceleration due to gravity, and t is time.

Front

What is the acceleration of an object in free fall near the Earth's surface?

Back

Approximately -9.8 m/s².

Front

What happens to the velocity of a free-falling object as it falls?

Back

The velocity increases due to the acceleration of gravity.

Front

What is the significance of the negative sign in the acceleration due to gravity?

Back

It indicates that the acceleration is directed downward.

Front

What is the time of flight for an object thrown vertically upward?

Back

The total time of flight is twice the time taken to reach the maximum height.