Physics Chapter on Friction and Motion

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What does the static friction force depend on?

The acceleration of the object

The velocity of the object

The mass of the object

The normal force and the coefficient of friction (correct)

Which statement accurately describes kinetic friction?

It is always greater than static friction.

It opposes the motion of an object that is already in motion. (correct)

It only occurs when the object is at rest.

It acts in the same direction as the object’s movement.

In which region of the friction graph would one observe static friction?

The area before the line levels off (correct)

The horizontal region after the breaking point

The region where the applied force is constant

The region where kinetic friction is dominant

What does the coefficient of friction ($μ$) represent in the friction equation?

A constant value that depends on the surfaces in contact (A) Signup and view all the answers

What occurs when an object reaches its breaking point in terms of static friction?

The object starts moving and kinetic friction takes over. (A) Signup and view all the answers

What distinguishes velocity from speed?

Velocity considers the total displacement, whereas speed considers total distance. (C) Signup and view all the answers

Which formula can accurately calculate an object's final velocity when given its initial velocity and acceleration?

$vf = vi + at$ (D) Signup and view all the answers

What does acceleration represent in kinematics?

It is the change in velocity over a period of time. (A) Signup and view all the answers

Which statement is true regarding distance and displacement?

Distance is the total length traveled, while displacement is the straight line between two points. (C) Signup and view all the answers

If an object is at rest, what is true about its acceleration and velocity?

Velocity is zero and acceleration is also zero. (B) Signup and view all the answers

Which statement correctly describes the relationship between mass and gravitational force?

Gravitational force increases as mass increases. (B) Signup and view all the answers

What does Hooke's Law imply about force and spring compression?

Force applied is directly proportional to the distance stretched or compressed. (A) Signup and view all the answers

According to the formula for gravitational force, what happens to the force if the distance between two masses is quadrupled?

The gravitational force decreases to one-sixteenth of its original value. (D) Signup and view all the answers

What units are used to measure the spring constant 'k' in Hooke's Law?

N/m (C) Signup and view all the answers

If an object is in free fall, which of the following forces acts upon it?

Only gravitational force. (C) Signup and view all the answers

Which statement best describes inertia?

Inertia is the tendency of an object to resist changes in its state of motion. (B) Signup and view all the answers

What is the correct relationship represented by Newton's Second Law of Motion?

The net force acting on an object is equal to the product of its mass and acceleration. (C) Signup and view all the answers

According to Newton's Third Law of Motion, what occurs when one object exerts a force on another?

The second object exerts an equal and opposite force on the first object. (A) Signup and view all the answers

How does mass affect the inertia of an object?

More mass results in greater inertia. (A) Signup and view all the answers

Which of the following expressions correctly defines the weight of an object?

Weight is measured as the product of mass and the acceleration due to gravity. (C) Signup and view all the answers

What happens to the velocity of an object moving in uniform circular motion?

The velocity changes continuously due to a change in direction. (C) Signup and view all the answers

Which of the following statements about centripetal acceleration is true?

Centripetal acceleration is directed towards the center of the circle. (A) Signup and view all the answers

If the speed of the object in uniform circular motion doubles, what happens to the centripetal force required to maintain that motion?

The centripetal force quadruples. (D) Signup and view all the answers

What is the role of centripetal force in uniform circular motion?

It causes the change in direction of the object moving in a circle. (B) Signup and view all the answers

What is the relationship between the radius of the circular path and centripetal acceleration, all else being equal?

Centripetal acceleration decreases as the radius increases. (B) Signup and view all the answers