Need help!!! if you can, please explain your answer... thanks! 1. Scalars are ph

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Need help!!!

if you can, please explain your answer... thanks!

1. Scalars are physical quantities that can be completely specified by their 2. A vector quantity is one that has both and.» 3. Classify each of the following physical quantities as vectors or scalars (a) Volumee (b) Force- (e) Density' (d) Velocity (e) Acceleration Answer Questions 4-7 with reference to Figure 3-6 below.+ 4. If Fl stands for a force vector of magnitude 30.0 N and F2 stands for a force vector of magnitude 40.0 N acting in the directions shown in Figure 3-6, what are the magnitude and direction of the resultant obtained by the vector addition of these two vectors using the analytical method? Show your work. Magnitude N Direction(relative to x axis) degrees 5. What is the equilibrant force that would be needed to compensate for the resultant force of the vectors Fl and F2 that you calculated in Question 4? Magnitude N Direction(relative to x axis) degrees»

Explanation / Answer

Q1) :physical quantities specified by magnitude only are called as scalar quantities. There is no role or significance of the direction.

Q2) :A vector quantity is one which has a magnitude in a specified direction or we can say a physical quantity having both magnitude as well as a specified direction is called as vector quantity.

For example a car having velocity of 45m/s towards east. Here 45m/s is magnitude of velocity and east is the direction of velocity.

Q3) :volume:

since volume has only magnitude like 3m³ etc and there is no specific direction, therefore it is a scalar quantity.

Force: lets say a person applied a force of 5N at an angle of 45°to the horizontal. Here it has both magnitude as well as direction which are necessary to define it completely, therefore it is a vector quantity.

Density: we always say that density of a substance, for instance say, is 5 g/cm³. Here what we are concerned with is the magnitude only. There is no direction of density. So it is a scalar quantity.

Velocity :for a velocity we need both magnitude of velocity as well as direction of velocity, so it is a vector quantity.

Acceleration :we need magnitude as well as direction of acceleration. So it has both magnitude as well as the direction therefore it is a vector quantity.

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