Vectors,scalars And Graphs Of Motion

Question 1

Scaler quantities

Answer 1

physical quantities that have magnitude only such as time,mass and charge Scalar quantities can just be added or subtracted

Question 2

Vector quantities

Answer 2

Physical quantities that have both magnitude and direction such as force and wait vector quantities can just be idle subtracted but they need to be added or subtracted algebraically as they have a direction

Question 3

Negative vectors and scalars

Answer 3

Negative factors have the same magnitude as a positive vector a travel in the opposite direction negative scalars have a much smaller magnitude

Question 4

Resultant

Answer 4

They combined effort of a number of vectors the resultant is the vector quantity that has the same effect as two or more vector quantities

Question 5

motion

Answer 5

Change in position of the body with respect to time

Question 6

Frames of reference

Answer 6

A set of reference points such as the set of access that enables the position of an object to be defined at any time

Question 7

Position

Answer 7

Plotted relative to a reference point or Arjun it is Vector quantity

Question 8

One dimensional motion

Answer 8

Motion along a straight line and can be either in One Direction or the opposite direction

Question 9

Distance

Answer 9

The length of the path that an object moves along from one position to another it is the scaler quantity and is represented D ,it is measured in metres

Question 10

Displacement

Answer 10

Change in position it is the magnitude and direction of a straight line drawn from the initial to final point it is a vector quantity and is represented as delta X or delta Y is measured in metres in a certain direction

Question 11

Calculating displacement

Answer 11

You don’t displacement equals X final minus X initial so Delta X= Xf-Xi

Question 12

Average speed

Answer 12

Total distance travelled divided by the total time the constant speed message through for a car to travel the distance in a certain time

Question 13

Average speed formula

Answer 13

Average speed = distance/time

it is measured in metres per second it is Scalar quantity and has magnitude only it is the quotient of two scalars

Question 14

Average velocity

Answer 14

You displacement or change in position divided by the total time taken the last has both magnitude and direction

Question 15

Average velocity formula

Answer 15

V=delta X/ delta t

It is measured in metres per second in a direction

Question 16

Conversion kilometres per hour to metres per second

Answer 16

Divide by 3, 6

Question 17

Average acceleration

Answer 17

Change in velocity divided by time taken

Question 18

Average acceleration formula

Answer 18

A = delta V/delta t

It is measured in metres per second squared in a direction as it is a vector quantity

Question 19

Positive and negative acceleration

Answer 19

In one dimensional motion positive and negative in opposite directions positive exhilaration is what we commonly term acceleration and negative acceleration is what we term deceleration

Question 20

Formula for calculating gradient

Answer 20

Delta Y/Delta X

Question 21

Instantaneous velocity

Answer 21

Displacement divided by an infantismal time interval is a vector quantity the gradient of a tangent of a point on a position time graph formula is V equals delta X/Delta T it is measured in metres per second in a direction

Question 22

Instantaneous speed

Answer 22

Same as the magnitude of instantaneous velocity

Question 23

Physical quantity

Answer 23

Measurable property of something we find in nature

Question 24

Displacement time graphs or delta X-T graphs

Answer 24

Stationery so V=zero is a straight horizontal line
Constant velocity forwards is a straight line up to the right hand corner
Constant velocity backwards is a straight line down from the left-hand corner
Increasing velocity so positive acceleration is a curved graph from nought up to the right hand corner
Decreasing velocity so negative acceleration is a curve graph from nought up to right hand corner so that looks like a sun
Gradient = velocity

Question 25

Time graphs or V-T graphs

Answer 25

Constant velocity so no acceleration is a straight horizontal line
increase in velocity so positive acceleration is a straight line from nought up to the right hand corner decreasing velocity so negative acceleration is a straight line from top left-hand corner to the bottom
Gradient=acceleration
Area under graph = displacement

Question 26

acceleration time graphs

Answer 26

Constant velocity so zero exhilaration is straight line on the nought line
positive acceleration is a straight line above the zero line
negative acceleration is a straight line below the zero line

Question 27

equations of motion

Answer 27

✨✨✨for equations uniform and average acceleration must be same at all times and motion in 1-D only✨✨✨

Vf=Vi +a🔺t

(Vf)square = (Vi)square + 2a🔺x

🔺x =Vi🔺t +1/2a(🔺t)square

🔺x =(Vi +Vf)/2 x 🔺t

Question 28

Braking distance

Answer 28

Shortest distance it takes the brakes of a vehicle to bring it to a stop proportional to the square of the speed

Question 29

Thinking distance

Answer 29

Distance of the vehicle travels before the drive applies breaks

Question 30

Stopping distance

Answer 30

Total distance need to stop a motor vehicle

Question 31

Following distance

Answer 31

Distance between the cars on the road