what is meant by?

Question

velocity,displacement,thrust????????

Answer 1

The velocity of an object is simply total speed in a particular direction. Since velocity is defined as a vector, both speed and direction are required to define it.

In Newtonian mechanics, displacement is the vector that specifies the position of a point or a particle in reference to an origin or to a previous position. The vector directs from the reference point to the current position.

Thrust is a reaction force described quantitatively by Newton's Second and Third Laws. When a system expels or accelerates mass in one direction the accelerated mass will cause a proportional but opposite force on that system.

Answer 2

The velocity is a physical quantity of an object's motion. Velocity is speed that has a clearly stated direction. e.g. 5 miles per hour is not a vector, where as north at 5 miles per hour is a vector. If the motion is in a straight line in only one direction, it is the same as speed. The average velocity (v) of an object moving a displacement(s) in a straight line during a time interval (t) is described by the formula:v=s/t

In Newtonian mechanics, displacement is the vector that specifies the position of a point or a particle in reference to an origin or to a previous position. The vector directs from the reference point to the current position.

Thrust is a reaction force described quantitatively by Newton's Second and Third Laws. When a system expels or accelerates mass in one direction the accelerated mass will cause a proportional but opposite force on that system.

Answer 3

i) Velocity:
The velocity of an object is simply total speed in a particular direction. Since velocity is defined as a vector, both speed and direction are required to define it.

ii) Displacement:
In Newtonian mechanics, displacement is the vector that specifies the position of a point or a particle in reference to an origin or to a previous position. The vector directs from the reference point to the current position.

iii) Thrust:
Thrust is a reaction force described quantitatively by Newton's Second and Third Laws. When a system expels or accelerates mass in one direction the accelerated mass will cause a proportional but opposite force on that system.

I hope that is of some assistance.

Answer 4

Velocity-

The time rate of change of position of a body in a particular direction. Linear velocity is velocity along a straight line, and its magnitude is commonly measured in such units as meters per second (m/s), feet per second (ft/s), and miles per hour (mi/h). Since both a magnitude and a direction are implied in a measurement of velocity, velocity is a directed or vector quantity, and to specify a velocity completely, the direction must always be given. The magnitude only is called the speed. See also Speed.

A body need not move in a straight line path to possess linear velocity. When a body is constrained to move along a curved path, it possesses at any point an instantaneous linear velocity in the direction of the tangent to the curve at that point. The average value of the linear velocity is defined as the ratio of the displacement to the elapsed time interval during which the displacement took place.

Displacement-

In Newtonian mechanics, displacement is the vector that specifies the position of a point or a particle in reference to an origin or to a previous position. The vector directs from the reference point to the current position.

Displacement vector versus distance travelled along a pathWhen the reference point is the origin of the chosen axis-system, the displacement vector is better referred to as the position vector, which expresses position by the straight line directed from the origin to the current position (as opposed to the scalar quantity distance which expresses only the length). The SI unit for either distance or the displacement magnitude is the meter. This use of displacement vector can describe the complete motion as well as the path of the particle.

When the reference point is a previous position of the particle, the displacement vector indicates the sense of movement by a vector directing from the previous position to the current position. This use of displacement vector is useful for defining the velocity and acceleration vectors of the particle.

By plotting the displacement (relative to the starting point) against time on a position vs. time graph, the average velocity or the instantaneous velocity can be found by taking the slope of the graph or the derivative of the graph, respectively.

In dealing with the motion of a rigid/firm body, the term displacement may also include the rotations of the body.

Thrust -

The force that propels an aerospace vehicle or marine craft. Thrust is a vector quantity. Its magnitude is usually given in newtons (N) in International System (SI) units or pounds-force (lbf) in U.S. Customary Units. A newton is defined as 1 kilogram mass times an acceleration of 1 meter per second squared. One newton equals approximately 0.2248 lbf.

The thrust power of a vehicle is the thrust times the velocity of the vehicle. It is expressed in joules (J) per second or watts (W) in SI units. In U.S. Customary Units thrust power is expressed in foot-pounds per second, which can be converted to horsepower by dividing by 550..

Answer 5

velocity- velocity of a body is defined as the distance travelled by the body per unit time in a given direction. its SI UNIT is 'm/s'.
v= s/t

displacement- the shortest distance between the initial position & the final position of the body is known as displacement.it is a vector quantity.

thrust - the force acting on a body perpendicular to its surface is called thrust. its SI UNIT is newton (N) .
pressure= thrust/ area

Answer 6

Havent u gone through ur course books.
I dont want 2 repeat what al of my friends have done.

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