AP Physics 1: Dynamics Review (Newton's 3 Laws and Friction)

The video tutorial covers dynamics topics for the AP Physics One exam, including the differences between inertial and gravitational mass, Newton's three laws of motion, and the concepts of force and friction. It explains how to draw free body diagrams and discusses the importance of understanding net external forces. The tutorial also covers the relationship between static and kinetic friction, and how to analyze forces on inclined planes. The session concludes with a discussion on translational equilibrium and a preview of upcoming topics on work, energy, and power.

What is the primary difference between inertial mass and gravitational mass?

• Inertial mass measures resistance to acceleration, while gravitational mass measures weight.

• Inertial mass measures weight, while gravitational mass measures resistance to acceleration.

• Gravitational mass is always greater than inertial mass.

• Inertial mass is always greater than gravitational mass.

According to Newton's first law, what condition must be met for an object to maintain its state of motion?

• The object must be at rest.

• The object must be acted upon by a net external force.

• The net external force must be zero.

• The object must be moving at a constant speed.

In Newton's second law, how is acceleration related to net force and mass?

• Acceleration is inversely proportional to both net force and mass.

• Acceleration is directly proportional to both net force and mass.

• Acceleration is directly proportional to net force and inversely proportional to mass.

• Acceleration is inversely proportional to net force and directly proportional to mass.

When drawing a free body diagram, what should you avoid doing initially?

• Drawing arrows to represent forces.

• Breaking forces into components.

• Labeling all forces.

• Identifying the direction of forces.

Which of the following is true about the force of friction?

• It is always greater than the normal force.

• It is independent of the direction of the applied force.

• It always acts in the direction of motion.

• It is always perpendicular to the surface.

What is the relationship between static and kinetic friction coefficients?

• They are always equal.

• Static friction coefficient is always greater than kinetic friction coefficient.

• They are unrelated.

• Static friction coefficient is always less than kinetic friction coefficient.

According to Newton's third law, what happens when object one exerts a force on object two?

• Object two exerts a larger force on object one.

• Object two exerts no force on object one.

• Object two exerts a smaller force on object one.

• Object two exerts an equal and opposite force on object one.

What is translational equilibrium?

• When an object is at rest.

• When the net force on an object is zero.

• When an object is moving at a constant speed.

• When the acceleration of an object is non-zero.

What happens to the force of gravity parallel to an incline as the incline angle approaches zero?

• It remains constant.

• It decreases.

• It increases.

• It becomes zero.

What is the significance of the net force being zero in translational equilibrium?

• The object must be accelerating.

• The object must be decelerating.

• The object is either at rest or moving at a constant velocity.

• The object is changing direction.