L Flashcards
What does the formula | Fnet = △p / △t |
Net force from momentum and time
What does the formula j = Favg△t = △p find?
Impulse from average force and time, aka change in momentum
What are the units of impulse?
kg • m / s
What does the vcm formula find
Velocity of the center of mass from sum of momentums and sum of masses.
What is conserved in an inelastic collision?
Momentum only
What makes perfectly inelastic collisions different than inelastic collisions?
Perfectly inelastic collisions stick together after a collision.
What makes elastic collisions different than inelastic collisions?
Elastic collisions do not deform the object in the collision.
What does the slope of the momentum vs time graph tell us?
Force
What does the area under the force vs time graph tell us?
Impulse or change in momentum
Place each of the seven measurements under either scalar and vectors.
SCALARS: Distance, Speed, Time, Mass, Work, Energy, Power
VECTORS: Acceleration, Displacement, Position, Velocity, Force, Momentum, Impulse
What does the conservation of momentum say?
In the absence of external forces, the total momentum is conserved.
What is conserved in a perfectly inelastic collision?
Momentum only
What is conserved in an elastic collision?
Energy and momentum
What are the SI units for Length?
Meters
What are the SI units for Time?
Seconds
What are the SI units for Mass?
Kilograms
What is the formula for average velocity?
v = △x / △t
What does the slope of a graph tell us?
△y units / △x units
What is constant in all inertial reference frames?
Acceleration
What does the area under the graph of velocity time tell us?
Displacement = Change in position
What does the slope of the position time graph tell us?
Velocity
What does the slope of the velocity time graph tell us?
Acceleration
What does mass measure?
An object’s resistance to change in motion
Newton’s Second Law gives us this formula, what is another way to use this formula?
F = ma
What is the formula for displacement?
Δx = x - x₀
What is the formula for average acceleration?
a = △v / △t
What does area under a graph tell us?
Change in x units times y units
What does g = 9.8 m/s represent?
The acceleration of gravity
What does the area under the graph of acceleration time tell us?
Change in velocity
What does Newton’s First Law say?
An object’s velocity will not change unless acted on by a force.
What does Newton’s Third Law say?
Forces exist in pairs. FA on B = -FB on A
The SI unit of force is the Newton, what is the Newton equal to?
kg·m/s²
What is the formula for weight?
Weight = mass × g
