DYNAMICS FINALS

When bodies are accelerated, i.e., when the magnitude or the direction of their velocity changes, it is

necessary to use

• Newton’s first law

• Newton’s second law

• Newton’s third law

Newton’s second law can be stated as follows:

• If the resultant force acting on a particle is not zero, the particle will have an acceleration

  proportional to the magnitude of the resultant and in the direction of this resultant force.

• If the resultant force acting on a particle is equal to zero, the particle will have an acceleration

  proportional to the magnitude of the resultant and in the direction of this resultant force.

• If the resultant force acting on a particle is not zero, the particle will have an acceleration

  proportional to the moment of the resultant and in the direction of this resultant force.

• If the resultant force acting on a particle is equal to zero, the particle will have an acceleration

  proportional to the moment of the resultant and in the direction of this resultant force.

The constant value obtained for the ratio of the magnitudes of the forces and

accelerations is a characteristic of the particle under consideration; it is the * of the

particles and is denoted by m.

• Magnitude

• Mass

• Moment

• Members

The vector mv is called the *, or simply the momentum, of the

particle. It has the same direction as the velocity of the particle, and its magnitude is equal to

the product of the mass m and the speed v of the particle

• Linear Momentum

• Angular Momentum

• Impulse Momentum

The second is the same as the corresponding SI

unit. The foot is defined as *

• 0.5048 m

• 0.2048 m

• 0.4048 m

• 0.3048 m

The pound is defined as the weight of a platinum standard, called the standard pound, which kept at the National Institute of Standards and Technology outside Washington and the mass of which is.

• 0.45359243 kg

• 1.45359243 kg

• 3.45359243 kg

• 2.45359243 kg

1 slug is equal to:

• 1 lb ∙ s²/ft

• 1 kg ∙ s²/ft

• 1 lb ∙ m/s²

• 1 kg ∙ m/s²

In curvilinear motion, however, the displacement vector will change both *.

• Magnitude and Direction

• Magnitude and Speed

• Weight and Direction

• Weight and Speed

* of a rigid body has been defined as the motion in which a straight line

passing through any two points of the body always remains parallel to its initial position.

• Acceleration

• Translation

• Magnitude

• Direction

The * states that the net work done on an object equals the change in its kinetic energy.

• Work-Energy Theorem

• Impulse-Force Theorem

• Work-Force Theorem

• Impulse-Energy Theorem