Chapter 6 Review

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.

Front

What is the coefficient of kinetic friction (μ)?

Back

The coefficient of kinetic friction (μ) is a dimensionless scalar value that represents the frictional force between two objects in motion relative to each other. It is defined as the ratio of the force of kinetic friction to the normal force.

Front

How does tension in a string affect the motion of attached masses?

Back

Tension in a string connecting two masses affects their motion by ensuring that both masses experience the same acceleration, as long as the string is massless and there is no slack.

Front

What is the normal force?

Back

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

Front

Under what conditions can the normal force equal the gravitational force?

Back

The normal force can equal the gravitational force when an object is resting on a horizontal surface with no additional vertical forces acting on it.

Front

What is the relationship between action and reaction forces?

Back

According to Newton's Third Law, for every action, there is an equal and opposite reaction. This means that the force exerted by one object on another is met with a force of equal magnitude but opposite direction from the second object.

Front

What happens to the acceleration of a system of attached masses if one mass is heavier than the other?

Back

In a system of attached masses, both masses will have the same acceleration regardless of their individual weights, as they are connected by a string.

Front

What is the formula for calculating acceleration?

Back

Acceleration (a) can be calculated using the formula a = F/m, where F is the net force acting on the object and m is its mass.

Front

How does friction affect the motion of an object?

Back

Friction opposes the motion of an object, reducing its acceleration and affecting its overall movement. The force of friction depends on the nature of the surfaces in contact and the normal force.

Front

What is the significance of a frictionless surface in physics problems?

Back

A frictionless surface simplifies physics problems by eliminating the frictional force, allowing for straightforward calculations of motion based solely on applied forces.