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

Does an object in space experience free fall?

Back

Yes, an object in space experiences free fall if there is no air resistance.

Front

What happens to the velocity of an object at the highest point of its trajectory when thrown upwards?

Back

At the highest point, the velocity (v) is 0, but the acceleration (a) is not 0 due to gravity.

Front

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

Back

Height (h) can be calculated using the formula h = 0.5 * g * t^2, where g is the acceleration due to gravity (approximately 9.81 m/s²) and t is the time in seconds.

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

Why do different objects fall at different rates in the presence of air?

Back

Different objects fall at different rates due to the effect of air resistance, which can vary based on shape and surface area.

Front

What is the initial speed of an object thrown upwards if it remains in the air for 6 seconds?

Back

The initial speed can be calculated using the formula v = g * t, where g is 9.81 m/s² and t is 3 seconds (half of the total time). Thus, v = 9.81 m/s² * 3 s = 29.43 m/s.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is terminal velocity?

Back

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

Front

How does air resistance affect falling objects?

Back

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