When no work is done explain?
If a force is applied but the object doesn’t move, no work is done; if a force is applied and the object moves a distance d in a direction other than the direction of the force, less work is done than if the object moves a distance d in the direction of the applied force.
Why is work a scalar product?
Work is a scalar quantity because it is the dot product of two vectors (Force and displacement). Dot product of two vectors becomes scalar quantity. So, work done has only magnitude but not direction. Work done may be positive, negative or zero.
Is density a scalar?
Scalar, a physical quantity that is completely described by its magnitude; examples of scalars are volume, density, speed, energy, mass, and time. Other quantities, such as force and velocity, have both magnitude and direction and are called vectors.
Is time a scalar?
Scalar quantities have only magnitude; vector quantities have both magnitude and direction. Time is completely separated from direction; it is a scalar. It has only magnitude, no direction. Time is a scalar.
What is not a scalar quantity?
A scalar quantity is a physical quantity which require only magnitude for its complete specification. As per the options given in the question, the momentum is not a scalar quantity. The momentum of a body is defined as the product of mass with velocity .
Is distance a vector or scalar?
Distance is a scalar quantity that refers to “how much ground an object has covered” during its motion. Displacement is a vector quantity that refers to “how far out of place an object is”; it is the object’s overall change in position.
What is a vector quantity?
Vector, in physics, a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity’s magnitude.
What is vector short answer?
A vector is a quantity or phenomenon that has two independent properties: magnitude and direction. Examples of vectors in nature are velocity, momentum, force, electromagnetic fields, and weight. (Weight is the force produced by the acceleration of gravity acting on a mass.)
What are vectors give 2 examples?
The vectors are organisms that act as a carrier of a pathogen (disease-causing agent) from one person to other. For example, the female anopheles mosquito is a vector of malaria, and tsetse flies act as a vector of sleeping sickness.
What is another word for vector?
In this page you can discover 21 synonyms, antonyms, idiomatic expressions, and related words for vector, like: transmitter, linear, raster, binary, 1-d, scalar, bearing, course, heading, approach and matrix.
Why is small angle a vector?
But then he said that a very very small angle (limit) can be considered as a vector because it has negligible effect on the vector mathematics, namely that vector a + vector b = vector b + vector a. Because no matter how much small you rotate something, that small change will effect the result even though it is tiny.
Is current density a vector quantity?
Despite being the ratio of two scalar quantities, current density is a vector. actually, it’s because current density is defined as the product of charge density and velocity for any location in space… J = ρ v. The two equations are equivalent in magnitude as shown below.
Can area be a vector?
Vectors are quantities that are fully described by both a magnitude and a direction. area is NOT a vector. If you are dealing with planar regions in three dimensions, then it can be convenient to represent the “area” as a vector whose length is the actual scalar area and whose direction is perpendicular to the plane.
Why electric flux is a scalar?
Electric flux is a scalar quantity. It is a scalar because it is the dot product of two vector quantities, electric field and the perpendicular differential area.
Is Electric a vector charge?
1 Answer. Nothing is a vector until defined with a direction. Electric charge is a scalar quantity because charge never graduated into the level of vectors or tensors that need both magnitude and direction.