uiz #4 Newtons second law and free fall F2024

Front

What is Newton's Second Law of Motion?

Back

Newton's Second Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. It can be expressed with the formula F = ma, where F is the force, m is the mass, and a is the acceleration.

Front

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

Back

The distance (d) fallen by an object in free fall can be calculated using the formula: d = 0.5 * g * t², where g is the acceleration due to gravity (approximately 10 m/s²) and t is the time in seconds.

Front

What is the acceleration due to gravity (g) on Earth?

Back

The acceleration due to gravity (g) on Earth is approximately 9.8 m/s², often rounded to 10 m/s² for simplicity in calculations.

Front

What happens to the acceleration of a falling object when air resistance is present?

Back

When air resistance is present, the acceleration of a falling object is less than g (the acceleration due to gravity) because the air resistance opposes the motion of the object.

Front

What is the Law of Inertia?

Back

The Law of Inertia, also known as Newton's First Law, states that an object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity unless acted upon by a net external force.

Front

How do you calculate the unbalanced force acting on an object?

Back

The unbalanced force (F) acting on an object can be calculated using Newton's Second Law: F = ma, where m is the mass of the object and a is its acceleration.

Front

What is free fall?

Back

Free fall is the motion of an object under the influence of gravitational force only, with no other forces (like air resistance) acting on it.

Front

What is terminal velocity?

Back

Terminal velocity is the constant speed that a freely falling object eventually reaches when the resistance of the medium (like air) prevents further acceleration.

Front

What is the relationship between mass and acceleration in Newton's Second Law?

Back

In Newton's Second Law, mass and acceleration are inversely related; as mass increases, for a given force, the acceleration decreases.

Front

What is drag force?

Back

Drag force is the resistance force experienced by an object moving through a fluid (like air or water), which opposes the motion of the object.