Can you get a straw all the way through a potato?

Write this down in your planner:

By Friday, look at BBC Bitesize (AQA Additional Science).

Read the ‘revision’ section on Representing Motion. Complete the ‘activity’.

Extended Learning Task

Extended Learning Task

Saturday 22 April 2023

MotionLearning Objectives:

•How to interpret the slope of a distance-time graph.

•How to calculate the speed of a body using the speed equation.

•The difference between speed and velocity.

How do the rozzers know when to give you a speeding ticket?

http://www.bbc.co.uk/learningzone/clips/calculating-the-speed-of-a-car/23.html

The equation to remember:

Speed = Distance Time

The units we use for speed (in physics) are m/s (metres per second)

Speed - Time Graphs

http://www.bbc.co.uk/learningzone/clips/speed-time-graphs/10673.html

Copy this

page

The Voyager 1 is travelling at 17 500 m/s and has been travelling for around 30 years.

How far away is it now?

Copy this

page

Write out the equation you useDistance [m] = Speed [m/s] x Time [s]

Write in the numbers of what you knowDistance = 17 500 [m/s] x (30 x 365 x 24 x 60 x 60) [s]

Calculate the answer and remember the unitsDistance = 1.66 x 1013 m

(16 600 000 000 000 m!)

How to answer physics questionsCopy this

page

Distance – Time GraphsWe can represent the motion of an object on a

distance – time graph.

The gradient of the line shows us the speed of the object. Steep line = fast. Shallow line = slow.

Copy this

page

Time (seconds)

Distance (metres)

Saturday 22 April 2023

Velocity and Acceleration

Learning Objectives:

•Define acceleration as the rate of change of velocity.

•Interpret the slope of a velocity-time graph.

•Calculate the distance travelled by the area under a v-t graph.

Velocity is speed in a given

direction.

Acceleration is the rate of change of velocity.

The slope of a velocity-time graph allows you to work out the acceleration.

a = v – u t

Acceleration from a graph

time

Velo

city

u

v

t

a = v – u t

Task 1 – you try

time

Velo

city

u = 4

v = 12

t = 16

time

Velo

city

u = 15

v = 5t = 10

Count/calculate the number of tiny squares in each shape.

The distance travelled is the area under a velocity-time graph.

time

Velo

city

u

v

t

Draw an accurate and detailed distance-time and a velocity-time graph for a journey that someone else in your family makes. Interview them to get the data you need.

Label the graphs to explain what they are doing at each stage on the graphs.

Extended Learning Task

Extended Learning Task

Draw a distance-time graph, a velocity-time graph and work out the distance travelled for the following scenario.

A ferret travels:• 4 metres in 10 seconds,• then it is stationary for 5 seconds,• then 2m in 2s,• then 8m in 1s,• then 1m in 8s,• then 3m in 6s.

If the velocity is increasing then acceleration is a positive value.

When we have a negative acceleration (a deceleration) then the velocity is decreasing.

If the acceleration is 0 then an object is either stationary, or travelling at a constant velocity.

Distance-time graph

Velocity-time graph

Gradient of line

Area under line

Velocity Acceleration

Distance

Copy this

table

Incident (A)Car moves

onto motorway

(B)Twin

shoots at car

(C)Gold car

turns over

(D)Black car turns over

(E)Twin flies into car

(F)Agent

jumps onto car

Speed(m/s) 35 40 35 25 30 25Time on stop watch 0 4 24 46 65 109

Time in seconds 4 20 22 19

Incident (G)Agent pulls off

top of car

(H)Trinity slams

on the breaks

(I)Tyre on car

burst

(J)Car gets

slammed into wall

(K)Car stops

speed(m/s) 25 0 25 20 0Time on stop watch

140 147 167 182 192

Time in seconds

0

The Matrix Car Chase

Plot these results on a speed time graph, with time on the bottom axis (the x axis) and speed on the side axis (the y axis).

Label the points where there is a change in motion A,B,C,D,E,F,H,I,J and K.

For example: point A is at time 0 and speed 0.