Distance Displacement Speed Snd Velocity

Question 1

What is a vector quantity?

Answer 1

A vector quantity has both magnitude (size) and direction.

Examples include force, velocity, displacement, weight, acceleration, and momentum.

Question 2

What is a scalar quantity?

Answer 2

A scalar quantity has only magnitude and no direction.

Examples include speed, distance, mass, energy, temperature, and time.

Question 3

What is the difference between speed and velocity?

Answer 3

Speed is a scalar quantity measuring how fast an object is going, while velocity is a vector quantity that includes direction.

Example: 30 mph is speed; 30 mph north is velocity.

Question 4

Define distance in terms of physics.

Answer 4

Distance is how far an object has moved and is a scalar quantity.

It does not involve direction.

Question 5

Define displacement in terms of physics.

Answer 5

Displacement is a vector quantity measuring distance and direction from the starting point to the finishing point.

Example: A plane flew 5 metres north.

Question 6

If someone walks 5 m north and then 5 m south, what is their displacement?

Answer 6

0 m

The distance travelled is 10 m.

Question 7

What is the formula relating distance, speed, and time?

Answer 7

distance travelled (m) = (average) speed (m/s) × time (s)

This applies when the object is travelling at a constant speed.

Question 8

What are typical walking speeds?

Answer 8

1.4 m/s (5 km/h)

This is an average walking speed.

Question 9

What are typical running speeds?

Answer 9

3 m/s (11 km/h)

This is an average running speed.

Question 10

What are typical cycling speeds?

Answer 10

5.5 m/s (20 km/h)

This is an average cycling speed.

Question 11

What is the typical speed of cars in a built-up area?

Answer 11

13 m/s (47 km/h)

This is an average speed for cars in urban areas.

Question 12

What is the typical speed of cars on a motorway?

Answer 12

31 m/s (112 km/h)

This is an average speed for cars on motorways.

Question 13

What is the speed of sound in air?

Answer 13

340 m/s

This is the average speed of sound in air under normal conditions.

Question 14

Fill in the blank: Velocity is speed in a given _______.

Answer 14

direction

Question 15

True or False: Both speed and velocity can change if an object is moving in a straight line at a constant speed.

Answer 15

False

Speed remains constant while velocity can change if direction changes.