Physics

Question 1

What is a vector?

Answer 1

Vector
Magnitude/size.
Directions
Displacement (distance).

Example: If I move a rock 5 m( which is magnitude )is that vector or scalars? That is a scalar quantity because I didn’t give the direction it moved.

Once you determine that the rock move 5 m to the right that is vector quantity.

The vector version of distant is displacement

Question 2

What is the scaler

Answer 2

Scalar is indication of magnitude/size , speed, distance.

Question 3

What is displacement?

Answer 3

Displacement is a vector quantity

Displacement indicates how far in and what direction. It is always a straight line..

It is simply a change in position of an object

With displacement you also must address how far and what direction and object moves

Question 4

What is velocity

Answer 4

Velocity refers to the speed and direction and object is going

Question 5

Physicist often use square bracket around a symbol for a physical quantity to represent the dimensions of that quantity.

Answer 5

For example, if r is the radius of a cylinder and h is the height, then we write [r]= L and [h] = L to indicate the dimension of the radius and height are both of length

Similarly, if we use the symbol A for the surface area of a cylinder and V for its volume, then [A]= L2 and [V]= L3.

If we use the symbol M for mass the cylinder and the P for distant density of a material for which the cylinder is made then [m]= M &[ p] = ML to the -3rd power

Question 6

What is a dimensionless constant

Answer 6

A pure number having no unit attach and having a numerical value that is dependent on whether the system or unit may be used.

Question 7

How are vector represent it geometrically

Answer 7

They are represented by straight arrows, ➡️starting at one point on a coordinate access and ending at a different point.

The arrow ➡️represent the direction

The length is called the magnitude

Question 8

Terms and equations: Scalar

Answer 8

Scalar:
Time (seconds, s)

Distance: (meters,m)

Speed: (m/s)

Speed= distance/time

S=🔺d/🔺t

Question 9

Terms and equations: Vector

Answer 9

Displacement: (meters, m)

Velocity: (m/s)

V=🔺d/🔺t

Question 10

Capital delta 🔺

Answer 10

🔺 mean change

🔺t mean change in time

Question 11

Super important rules when adding vectors.

Answer 11

1. When adding vectors, always placed ahead of the vector on the tail of another
2. The direction and length (magnitude) of the vector can be changed.