Combined science P1 - Forces and motion Flashcards
What is the speed of an airliner
250 m/s
What is the speed of a high speed train
90 m/s
What is the speed of a commuter train
55 m/s
What is the speed of the motorway speed limit
31 m/s
What is the speed of a ferry
18 m/s
What is the speed of the speed limit in towns
10.5 m/s
What is the speed of cycling
6 m/s
What is the speed of walking
1.4 m/s
30 mph =
13 m/s
70 mph =
31 m/s `
What is the speed of something with a distance of 100 metres and a time of 12 seconds
8.3 m/s
What is the distance of something with a speed of 8 metres per second and a time of 25 seconds
200 m
What is the time of something with a distance of 400 metres and a speed of 8 m/s
50 s
What is the speed of something with a distance of 800 metres and a time of 125 seconds
6.4 m/s
What is the distance of something with a speed of 6 metres per second and a time of 500 seconds
3000 m
What is the time of something with a distance of 2000 metres and a speed of 6.25 m/s
320
What are the scalars? [6]
Distance, speed, energy, mass, time and temperature
What are the vectors? [6]
Acceleration, displacement, velocity, weight, force and momentum
What is a scalar
Scalars are a quantity that have magnitude (size)
What is a vector
Vectors have magnitude (size) and direction
What is the difference between displacement and distance travelled
Displacement is the distance from the start whereas distance is how far travelled.
What is acceleration
The measure of how quickly the velocity of something is changing. It can be positive if the object is speeding up or negative if it is slowing down. Acceleration is a vector quantity.
What is displacement
The distance travelled in a particular direction
What is velocity
The speed of the object in a particular direction usually measured in metres per second m/s. Velocity is a vector, speed is not.
What is momentum
How hard it is to make an object stop or change direction; or how much damage something might don on impact. Momentum is a vector quantity measured in kilogram metres per second Kgm/s
What does a horizontal line on a distance time graph mean
The object (distance from the starting point) is not changing
What does a straight sloping line on a distance time graph mean
The object is travelling at a constant speed
What does a steeper line on a distance time graph mean
The the object is travelling faster
How is speed calculated on a distance time graph
By the gradient of the line
What is the equation for acceleration
Change in velocity m/s
acceleration= ————————————
Time taken
What is the letters for the equation of acceleration
v-u
a= ——-
t
What is the equation for acceleration (harder)
v2 - u2 = 2 x a x d
How do you get accurate data for velocity and time as an object falls
Using light gates and a data logger as the object goes through the the first light gate and then the second it calculates the data
What is the text book value for acceleration due to gravity
g = 10 m/s2
A dog chasing a cat accelerates from the rest at 2 m/s2. How long will it take the dog to reach a velocity of 10 m/s
5 seconds
What do curved lines on a distance time graph
Changing speed
What is instantaneous speed
Speed at a particular instant
Gradient of a velocity time graph =
Time
On a velocity time graph what does a horizontal line mean
The object is travelling at constant velocity
On a velocity time graph what does a sloping line mean
The object is accelerating
On a velocity time graph what does a steeper line mean
Greater acceleration
On a velocity time graph how do you find the distance travelled
Area under the graph
If you split the graph into easier shapes to calculate and then add them together to find the areal
What is the equation of momentum
Mass x Velocity
Does a slow heavy object have lots of momentum
Yes
Does a small fast moving object have lots of momentum
Yes
All measurements have a….
Magnitude
Scalar quantities have only magnitude, vector quantities have magnitude and ….
Direction
