Motion

Question 0

The units that speed is measured in

Answer 0

M/s

Question 1

The equation for speed

Answer 1

Speed= distance/ time

Question 2

What is the line for a distance time graph at a constant speed

Answer 2

A straight line

Question 3

What controls the gradient of a graph

Answer 3

The speed

Question 4

What is the name for distance travelled in a specific direction

Answer 4

Displacement, this is a vector quantity

Question 5

What does a speedometer show

Answer 5

The instantaneous speed of the car

Question 6

What is velocity

Answer 6

Speed in a specified direction and is also a vector quantity

Question 7

What is the equation for acceleration

Answer 7

Acceleration= change in velocity
Time taken

Or a= (v-u)
t

Question 8

What are the units for acceleration

Answer 8

M/s(2)

Question 9

What is the equation for velocity

Answer 9

Velocity=
increase in displacement
Time taken

Question 10

What is the definition of deceleration

Answer 10

It means slowing down

The object will have a smaller final velocity than it’s starting velocity

Question 11

On a graph what does a shallow gradient mean

Answer 11

Low acceleration

Question 12

On a graph what does a steep gradient mean

Answer 12

High acceleration

Question 13

On a graph what does a horizontal gradient mean

Answer 13

No acceleration

Question 14

What does a downwards sloping graph mean

Answer 14

It means the gradient is negative

Deceleration

Question 15

what is the equation for average velocity

Answer 15

Initial velocity+ final velocity

2

Question 16

Acceleration of free fall

Answer 16

Objects that are said to be undergoing free fall, are not encountering a significant force of air resistance; they are falling under the sole influence of gravity. Under such conditions, all objects will fall with the same rate of acceleration, regardless of their mass

Question 17

Terminal velocity

Answer 17

Is when there is no resultant force and the object reaches a steady speed

Question 18

3 stages of falling object

Answer 18

At the start - accelerates downward, no air resistance
Resultant force acts downwards
As it gains speed- weight is the same, air resistance increases - resultant force is downwards
Eventually, the object’s weight is balanced by the air resistance. There is no resultant force and the object reaches a steady speed, called the terminal velocity.