Motion

Question 1

What is speed

Answer 1

A measure of the distance travelled by an object in a unit of time

Question 2

Speed equation

Answer 2

Speed = distance / time

Question 3

What is velocity

Answer 3

Speed of an object, with a given direction

Question 4

Scalar quantities

Answer 4

Only have a size (mass, temp, energy)

Question 5

Vector quantities

Answer 5

Only have a size and direction (weight)

Question 6

What is acceleration

Answer 6

Refers to change in velocity / the rate of change of velocity per unit of time

Question 7

Acceleration equation

Answer 7

Acceleration = change in velocity / time taken

V= u+at
U=v-at
T=v-u/a

Question 8

Change in velocity =

Answer 8

Final velocity - initial velocity

Question 9

What is the unit for acceleration

Answer 9

Measured in m/s^2

Question 10

On velocity time graphs what is the distance travelled

Answer 10

‘Area under line’

Question 11

Final speed equation

Answer 11

(Final speed)^2=(initial speed)^2 + (2 x acceleration x distance)

Question 12

Distance time graph

Answer 12

Straight up = constant speed

Question 13

Speed time graph

Answer 13

Straight up = acceleration

Question 14

Force is a …….. quantity

Answer 14

Vector

Question 15

Force equation

Answer 15

Force = mass x acceleration

F= ma

Mass in Kg

Question 16

What happens if there is no resultant force

Answer 16

The object does not accelerate (remains stationary or at a constant velocity)

Question 17

What is the acceleration of a falling object with no air resistance

Answer 17

10m/s^2

Question 18

In the absence of air resistance

Answer 18

Every mass will accelerate at 10 metres per second

Question 19

Falling objects with air resistance

Answer 19

All resistive forces increase the faster the object is moving

Question 20

What is terminal velocity

Answer 20

The maximum velocity attainable by an object as it falls through a fluid

Question 21

Factors affecting terminal velocity

Answer 21

Weight

Shape (greater area will have a larger resistance)