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Should a quantity having magnitude and direction be necessarily a vector?
Wiki User
∙ 12y ago
trey6t6
Wiki User
∙ 12y ago
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Is power scalar or vector quantity?
Power should be only scalar as there is no direction to the power, just the magnitude.
How do you calculate the velocity of a moving object from two points on a position time graph?
First, note that velocity is a vector quantity. This means it has a magnitude (the speed) as well as a direction. The magnitude of the velocity is the difference in position divided by difference in time. Hopefully, the direction should be evident from the graph.
Can displacement be equal to total distance traveled by an object?
Yes,the magnitude of both distance and displacement can be same provided the body continues to travel in a straight line and in the same direction. However you should remember that displacement is a vector quantity while distance is a scalar quantity so they both can be compared only by there magnitude.
Should a force have a direction?
Yes, it is vector with magnitude and direction
Is stress scalar or vector quantity?
Stress is tensor quantity. The stress tensor has 9 components. Each of its components has a magnitude (a scalar) and two directions associated with it.
Is electric charge scalar or vector quantity?
Charge is a Scalar Quantity as it only have Magnitude not Direction.Like in 10 Coulomb of Charge, it has 10 as magnitude and Coulomb as Unit. But this is not showing any information which tell us that it is in a particular direction.
What is a unit of measurement?
A unit of measure is a way of describing a standardized quantity of something.Some examples of units of measure you should be familiar with:Distance/LengthfeetmilesmetersMasskilogramsForcefoot-poundsnewtons
What should a meaningful measurement have?
measurement value (magnitude of the quantity) and a proper unit.
Why pressure is scalar quantity where as force is vector quantity?
Pressure is the force acting in all directions on an area while force is a push or pull in a direction. To understand this, we have to know how pressure or force originates. While the force is applicable to rigid materials, the term pressure is applicable for bulk materials (like water) where individual particles are considered as soft. When a force is applied from one direction on the soft particle, the soft particle gets distorted and projects out in all directions. Pressure thus do not have any unique direction but all, while a force has a unique direction. When a bomb blasts, it effects in all directions in air whereas if a running car hits, it effects in the specific direction only. A parameter effecting in all directions uniformly is considered as if it is a scalar. The pressure acts to all the directions uniformly. I mean in 360 degrees. So, we can't define a direction for pressure. The formula P= F/A is only the magnitude relation, not direction. It should be kept in mind. Mathematically, it can be understood as pressure is the ratio of force and vector area (which has direction along the normal to the surface upon which the force is acting, and if the force is not normal to to the surface we take component of force along normal. )
Why is electric current a scalar quantity?
For a physical quantity to be termed a vector quantity, having magnitude and direction is not enough. The quantity should obey the laws of vector addition too. Like the triangle law or the parallelogram law. As we know, if two currents meet at a junction, the total current of the resultant current will be the algebraic sum of the two current and not the vector sum.Sometimes, treating a current like a vector makes sense, like when the current though a conductor induces a magnetic field.
Is emf a scalar or vector quantity?
Emf has direction within a current loop, though it is not scalar. It's a bit between though as direction should be otherwise accounted for when discussing induced Emf. Not quite either.
When carts unequal masses push away from each other which cart has more momentum?
In elastic collisions, momentum is a completely conserved quantity, meaning that the total momentum of the system before the collision should equal to the total momentum of the system after the collision. In this case, the p initial was equal to 0, that means p final should have also been 0, the only way that could be achieved is if the momentum of both carts had the same magnitude but in the opposite direction. p = m*v so if p is the same, the cart with the heavier mass would necessarily have a slower speed than the light cart.
