Friction
An action that can change motion, push or a pull
What is force?
weight=mass*g
What is the equation for weight?
distance represent
What is x?
The rate of change of velocity, speed up or slowing down
What is acceleration?
Define velocity
What is speed with direction?
A force that opposes motion between two surfaces.
What is friction?
An object at rest stays at rest, and an object in motion stays in motion with the speed and in the same direction unless acted upon by an unbalanced force.
What is Newton's first law?
X not
What is Xo?
When you are at rest with the earth but moving relative to the sun
What is how can you be both at rest and also moving about 107,000 km/h at the same time?
Define magnitude?
What is too much?
F=μN
What is the equation for friction?
The acceleration of an object is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
What is Newton's second law?
Magnitude.
What is how much acceleration and velocity are vectors.
the slope of the curve on a velocity-verses-time graph
What is shows an object whose acceleration is changing as time goes by
quantities with both magnitude and direction
What is vector?
Define "Kinetic Friction"
What is when the object is moving.
(300+300)N=600N
So,she weighs about 600/10Kg=60Kg
Lucy Lightweight stands with one foot on one bathroom scale and her other foot on a second bathroom scale. Each scale reads 300N. What is Lucy's weight?
Vectors.
Quantities w/ both magnitude + direction.
Calculate the acceleration of a car (in km/h/s) that can go from rest to 100 km/h in 10s.
What is 100/10 = 10 km/h/s?
Define Displacement
What is shortest distance between 2 points with direction.
Two children push on a crate. They find that when they push together horizontally with forces of 155N and 187N respectively, the crate slides across the floor at a constant speed. Show that the force of friction between the crate and the floor is 342N.
What is 155 N + 187 N = 342 N.
Which has more mass, a 2kg fluffy pillow or a 3kg small piece of iron? More value? Why are your answers different?
What is the iron has more mass because 3 kg is more than 2 kg. The pillow has more volume because it's dimensions are bigger than the small piece of iron, although the iron has more mass. Volume = length x width x height.
x =xo+(vo)(t)
v=vo+(a)(t)
x=xo+(vo)(t)+1/2(a)(t)2
v2=v2o+2(a)( Δ x)
What is the "Big 4?"
Acceleration.
What is how far a freely falling object have fallen from a position of rest when its instantaneous speed is 10m/s?
Define Buoyancy