Chapter 3: Forces and Newtons Laws of Motion

________ published his work, the Mathematical Principles of Natural Philosophy, in 1687, revolutionizing the rational study of mechanics by introducing mathematical principles that all of nature was considered to obey.

If the centripetal force acting on an object is not sufficient to keep it moving in a(n) ________, the object will move outwards, away from the center of the circle.

Radially inward forces are positive and ________ are negative.

________ is a vector force that depends on an object's location in the universe, while mass is a scalar measure of an object's inertia.

The ________ (g) is the same as the acceleration due to gravity in free fall and projectile motion.

________ are a visual tool used to represent the forces acting on an object.

A car (mass M) takes a turn (of radius R) on a flat road without any slipping or sliding at a constant speed S. Find an expression for the ________ needed between the wheels and road.

________ is the force that keeps an object moving in a circular path.

The ability of an object to resist a change in its ________ is called inertia.

Forces that produce a nonzero net force, which changes an object's motion

Forces on an object that combine to give a zero net force and do not change the motion of the object.

A force that opposes motion between two surfaces that are in contact

Friction that occurs when one solid surface slides over another

Friction that occurs when an object rolls over a surface

The constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity

An objects resistance to change its motion

The motion of a falling object when the only force acting on it is gravity

the fluid friction experienced by objects falling through the air

The combination of all forces acting on an object

Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).

For every action by a force, there is an equal and opposite reaction by another force.

An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.