Dynamic Universe UNIT 1 Flashcards
Is momentum a vector or scalar
Vector
3 types of momentum
Collide and split
Collide and lock
Explosion
Total momentum before =
Total momentum after in the absent of External forces
Formulas for momentum
M1U1 + M2U2 = M1V1 + M2V2
M1U1 + M2U2 = (M1+M2) V
M1U1 +m2 (-u2) =m1 (-v1)+m2v2
If kinetic energy is not conserved then its
Inelastic
Is energy is conserved then its
Elastic
Equation of instantaneous speed
Length of card ÷ time through gate
Negative acceleration is
Deceleration
On a velocity time graph the acceleration is
The gradient of the graph
On a velocity time graph the distance is
The area under the graph
Definition of vector
Both magnitude and direction
What’s a scalar
By magnitude
The gradient of displacement time graph
Is velocity
Area under acceleration time graph provides
Velocity
Ares underneath velocity time graoh provides
Displacement
Area under acceleration time graph provides
Velocity
When figuring out what equation to use for the equation of motion questions
SUVAT
We can only use Suvat when the acceleration is
Uniform (constant)
What is a friction compensated slope
It means that the slope is at a perfect angle that the forward force is equal to the frictional force
What is acceleration due to gravity
-9.8m/s
3 types of uncertainties
Systematic
Random
Reading
What is a systemic error
When all the measurements are off by the same amount
How to calculate a reading uncertainty
Using the half the smallest division of the measurements ypu are using.
Then turn it into a percentage
Newtons frist law
An object remains at rest or a constant velocity unless acted upon by an unbalanced force