Flashcards in Forces And Motion Deck (22):
Use the following units
Metre per second m/s
Metre per second squared m/s2⃣
Newton per kilogram N/Kg
Kilogram metre per second Kgm/s
What are the skills needed for plotting distance time graphs?
plotting points accurately
Labelling axes with quantities and units
Selecting an appropriate scale filling over half the page avoiding weight scales
How do you join the dots on a distant time graph?
You connect the points dot to dot
What does the shape of a distance time graph look like at rest?
A straight, horizontal line
What does a distance time graph look like at a constant speed?
A straight line at a gradient
if the gradient is steeper then… Speed is faster
How do you work out the gradient on a graph?
Gradient = rise/run
Which = distance moved/time taken
What does a distance time graph look like at an increasing speed?
A curved line represents a change in speed
If the gradient of the line is increasing shallow to steep then speed is increasing
Is the gradient of the line is decreasing then the speed is decreasing
What equation links speed distance and time?
Speed = distance/time
Describe an experiment of how to investigate the nation of everyday objects such as toy cars what tennis balls?
1)Measure distance between points using ruler
Mark these points with a marker
Start the stopwatch when object passes 1st mark
Stop stopwatch when object passes second
Repeat 3 times to ensure its consistent data
Use speed = distance/ time to find out
Describe another experiment of how to investigate the nation of everyday objects such as toy cars what tennis balls?
Set up two light gates so that object passes through both
When the beam of light is broken it sends signal to computer
Measure distance between light gates with a ruler
(Same as last)
What is the equation that links exenteration, change in velocity, time?
Acceleration = change in velocity/time
How do you find the distance on the speed time graph?
Distance under the graph
If it's at a gradient then you do half distance times height
On a velocity time graph what's is the gradient equal to?
On a distance time graph what's the gradient equal to?
Equation which links force mass and acceleration
F = ma
What equation links wright mass and g?
Why does a falling object reach terminal velocity?
If I drop an object of the building it starts to accelerate
This is because there is a resultant force(greater than any drag acting)
As the object accelerates it's drag increase
Eventually drag = weight acting down
At this point there's no resultant force
Therefore the object doesn't accelerate and falls with a constant velocity known as terminal velocity
What factors effect thinking distance
What factors affect braking distance
Equation linking moment force and perpendicular distance from pivot
Moment = force ❌ perpendicular distances from pivot
What is the principal of moments?
A system is in equilibrium when the sum of the anticlockwise moment equals the sum of the clockwise moment