Chapter 6 Applications of Newton's Laws

These flashcards cover important concepts related to Newton's Laws, normal forces, frictional forces, connected objects, and circular motion, helping students to prepare for their upcoming exam.

What is the normal force?

The normal force is the force exerted by a surface on an object and is always perpendicular to that surface.

How does the normal force relate to an object's weight?

The normal force may be equal to, greater than, or less than the weight of the object.

What are the two types of friction discussed in the lecture?

Kinetic friction and static friction.

What is kinetic friction?

Kinetic friction is the friction experienced by surfaces sliding against one another.

What does static friction do?

The static frictional force keeps an object from starting to move when a force is applied.

What is the coefficient of kinetic friction?

A constant representing the ratio of the kinetic frictional force to the normal force.

What is Hooke’s Law in relation to springs?

Hooke’s Law states that the force in a spring increases with the amount it is stretched or compressed.

What happens when forces are exerted on connected objects?

Their accelerations are the same.

What is required for circular motion?

A force acting towards the center of the circle to keep the object moving in a circular path.

What role does tension play in systems involving pulleys?

Tension in a rope varies along its length and can change direction at an ideal pulley.

How does an incline affect normal force?

Normal force decreases on an incline compared to a flat surface.

What is the typical coefficient of kinetic friction for rubber on concrete (dry)?

0.80.

Describe how the normal force changes at the top of a Ferris wheel when in motion.

The normal force is smaller than the gravitational force acting on a person.

What occurs when a box on a flat board is lifted at an angle?

The box will slide down when the component of the gravitational force parallel to the plane becomes greater.

What happens when a car rounds a corner too quickly?

The friction between the tires and the road is not strong enough to keep the car in a circular path.

What determines the maximum value of static friction?

It can take on any value from zero up to a maximum depending on the force applied.

What is the effect of pulling or pushing a sled at an angle?

It can change the normal force acting on the sled.

In what condition will a mass remain stationary on an inclined plane?

When the angle of tilt is less than the critical angle determined by static friction.

What would be the consequence if the coefficient of friction were to decrease?

The object would be more likely to slide when a force is applied.

What key concept is essential in calculating unknown forces when in translational equilibrium?

The net force on the object is zero.