AP Physics - Dynamics (Forces)

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by a net external force.

Front

Define net force.

Back

The vector sum of all the forces acting on an object.

Front

What is the formula for calculating weight?

Back

Weight (W) = mass (m) × acceleration due to gravity (g), where g is approximately 9.81 m/s².

Front

What is the difference between static and kinetic friction?

Back

Static friction acts on objects that are not moving, while kinetic friction acts on objects that are sliding over each other.

Front

What is the normal force?

Back

The force exerted by a surface to support the weight of an object resting on it, acting perpendicular to the surface.

Front

How does the angle of an incline affect the normal force?

Back

As the angle of the incline increases, the normal force decreases.

Front

What is the coefficient of friction?

Back

A dimensionless scalar value that represents the ratio of the force of friction between two bodies and the force pressing them together.

Front

What is the action-reaction pair according to Newton's Third Law?

Back

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

Front

What happens to the acceleration of an object if the net force acting on it is zero?

Back

The object will not accelerate; it will either remain at rest or continue moving at a constant velocity.

Front

How do you calculate the force of gravity acting on an object?

Back

Force of gravity (F) = mass (m) × acceleration due to gravity (g).