Can you get a straw all the way through a potato?
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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
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The Voyager 1 is travelling at 17 500 m/s and has been travelling for around 30 years.
How far away is it now?
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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!)
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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.
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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
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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.