P5 - Distance,Displacement,Speed And Velocity

Question 1

Is distance a scalar or vector?

Answer 1

Scalar

Question 2

Is displacement a scalar or vector?

Answer 2

Vector

Question 3

What is distance?

Answer 3

Distance is just how far an object has moved. It’s a scalar quantity so it doesn’t involve direction

Question 4

What is displacement?

Answer 4

Displacement measures the distance and direction in a straight line from an object’s starting point to it finishing point. This means it’s a vector quantity.

(E.g the plane flew 5 metres north. The direction could be relative to a point, e.g. towards the echool, or a bearing (a threa-digit angle from north, 8. g. 035)

Question 5

What is your distance and displace if you walk 5m north then 5m south?

Answer 5

Displacement is 0m
Distance travelled is 10m

Question 6

What do speed and velocity measure?

Answer 6

How fast you are going

Question 7

Is speed scalar or a vector?

Answer 7

Scalar

Question 8

Is velocity a scalar or vector?

Answer 8

Vector

Question 9

What is speed?

Answer 9

Speed is just how fast you’re going (eg. 30 mph or 20 m/o) with no regard to the direction

Question 10

What is velocity?

Answer 10

Velocity is speed in a given direction, (e.g. 30 mph north or 20 m/s, 060°)

Question 11

What does speed and velocity show?

Answer 11

You can have objects travelling at a constant speed with a changing velocity.This happens when the object is changing direction whilst staying at the same speed.An object moving in a circle at a constant speed has a constantly hanging velocity, as the direction is always changing (e.g. a car going around a roundabout)

Question 12

Equation for distance travelled

Answer 12

Distance travelled (m) = speed (m/s) x time (s)

S = vt

Question 13

NOTE : About constant speed

Answer 13

Objects rarely fravel at a constant speed. E.g. when you walk, run or travel in a car. Your speed is always changing. For these cases, the formula above gives the average (mean) speed during that time.

Question 14

State 6 typical speeds for:

1) A person walking
2) A person running
3) A person cycling
4) A car
5) A train
6) A plane

Answer 14

A person walking - 1.5 m/s
A person running - 3 m/s
A person cycling - 6 m/s
A car - 25 m/s
A train - 30 m/s
A plane - 250 m/s

Question 15

What affects the speed for a person to walk?

Answer 15

Fitness, age, terrain etc.

( This doesn’t just go for humans it goes for multiple other objects too and speed of sound,wind etc)

Question 16

What can wind speed be affected by?

Answer 16

Temperature, atmospheric presaure and if there are its large buildings or etructures nearby le.g. forests reduce the speed of the air travelling through them