Motion and Newton's Laws

These flashcards cover key concepts involving motion, gravity, and Newton's laws, aiding in understanding the fundamental principles of classical mechanics.

What is the acceleration due to gravity on Earth?

Approximately 9.8 m/s².

What is the effect of air resistance on falling objects?

Neglecting air resistance, all objects fall at the same rate.

What is the kinematics equation for free falling objects?

v = v₀ - gt, y = y₀ - v₀t - 1/2 gt², v² = v₀² - 2g(y - y₀).

What do Newton’s laws of motion describe?

The dynamics of motion and the forces involved.

What is Newton’s first law of motion?

A body at rest remains at rest, and a body in motion remains in motion at constant velocity unless acted upon by a net external force.

What does a net force of zero indicate?

An object is either at rest or moving with constant velocity.

How does Newton’s second law relate force and mass?

The acceleration of a system is directly proportional to net external force and inversely proportional to its mass (F_net = ma).

What is Newton's third law of motion?

For every action, there is an equal and opposite reaction.

What is the SI unit of force?

Newton (N).

How can you calculate the required force when using Newton’s second law?

Using F = ma, where F is the net force, m is mass, and a is acceleration.

What must be true for an object to be in equilibrium?

The net force acting on the object must be zero.

What happens to the forces in a suspension bridge?

The forces maintain equilibrium to support the structure.

If a person lifts a box weighing 218 N, what formula can be used to determine the applied force when accelerating the box?

F = ma + w, where w is the weight of the box.

What happens when one body exerts a force on another according to Newton's third law?

The first body experiences an equal and opposite force from the second body.