Topic 1 - Forces Flashcards
T or F: A scalar value has a direction?
False
What does a vector value need?
Magnitude and Direction
How is delta represented?
With a triangle
What does delta mean?
Change in ___
What is the difference between distance and displacement?
Distance is total distance travelled, displacement is distance from start
T or F: Displacement is a vector value?
True
T or F: Speed uses displacement?
False
What is the equation for Velocity?
V = s/t (velocity = displacement/time)
What is acceleration?
Difference in velocity
How do you calculate acceleration?
Final velocity - initial velocity
How many SUVAT equations are there?
4
T or F: V = U + AT is a SUVAT Equation?
True
What does S stand for in the SUVAT equations?
Displacement
What is the symbol for time in SUVAT?
T
Manipulate this equation to equal A: V^2 = U^2 + 2AS
A = (V^2 - U^2) / 2S
How do you find the velocity at a point for a non-uniform acceleration?
Tangent/differentiate
For a Displacement x Time graph what does the gradient represent?
Velocity
T or F: An acceleration x time graph is linear?
True
How many of Newtons’ laws are there?
3
What is the Newtons’ 2nd law?
Force = mass x acceleration
T or F: Newton’s 3rd law is intertia
False
What is Newton’s 1st law?
Inertia
What is Newton’s 3rd law about?
Equal and Opposite actions.
What is Power = too?
Mass x Velocity
What symbol represents impulse?
I
What is Impulse equal too?
Change in Power
What is the expanded equation for Impulse?
M x V - M x U
What is the rule about conservation of Power?
P(before) = P(after)
What does work equal?
Change in energy
What does work measure?
Amount of force over a distance
What are the 2 equations for work?
Force x Displacement
Force x Displacement x Cos()
What does potential energy measure?
The energy of an object at a certain height
What is the equation for Potential Energy?
PE = Mass x Gravity x Height
T or F: Kinetic energy measures energy at a height?
False
What does Kinetic Energy measure?
Active energy
What is the Equation for Kinetic energy?
KE = 0.5 x Mass x Velocity^2
What is Mechanical energy equal too?
KE + PE
