Chapter 7. Book 3 application of basic mechanics.

Question 1

Define force

Answer 1

Force is a push or pool exerted on an object when a force is applied to an object in may or may not change the state of motion or rest the location the shape or the size of the object. The SI system unit of force is called the Newton.

Question 2

Define velocity

Answer 2

Velocity is the rate of change of position meaning that the change of position that occurs during a given time. Yes, I system unit is meter per second velocity is considered to be linear. Average velocity can be defined as a distance moves in a particular direction for a unit of time

Question 3

Define speed

Answer 3

Speed is a measure of the distance traveled per unit of time it has magnitude and no specific direction

Question 4

Mass versus weight

Answer 4

The mass of a body is unchanging, and does not vary according to its location. Mass will be the same on earth in space, or on the moon weight will change, depending on the effect of gravity at a given location.

Question 5

Pressure versus force

Answer 5

Force is the action on a body which tends to change its size, shape state of rest or state of motion pressure is defined as force per unit of area in acts in a direction normal to or at right angles to a surface pressure would be pounds per square inch

Question 6

Energey definition

Answer 6

Energy is defined as the capacity of a body or substance to perform work. Study of mechanics is concerned with two forms of mechanical energy, which are potential and kinetic energy

Question 7

Potential versus kinetic energy

Answer 7

Potential energy is the ability of a body to do work by virtue of its position. There is no movement change of any type, when considering purely potential energy kinetic energy is the ability of a body to do work due to its motion.

Question 8

Define work

Answer 8

The force is applied to a body and causes it to move through a distance then work is done

Question 9

Define power

Answer 9

Power is the rate of doing work. It is the quantity of work done in a given time.

Question 10

Ideal mechanical advantage versus actual mechanical advantage

Answer 10

Ideal mechanical advantage would be the ratio distance from the fulcrum to effort divided by the distance from the fulcrum to load actual mechanical advantage differs, because there will be system losses due to friction bending and stretching, and is expressed as a ratio or as a percentage, the actual mechanical advantage could be expressed as load actual divided by effort, actual equal actual mechanical advantage

Question 11

Turning moment is a what

Answer 11

Action around a point that will cause or tend to cause rotation