Forces
How do you find the horizontal component of a force?
Fx=Fcos(theta)
Note:
y-component: Fy=Fsin(theta)
What word represents "change in momentum" ?
Impulse
If you throw a ball up, what is the velocity at the maximum height?
v = 0 m/s
What does it mean for energy to be dissipated?
Energy is lost due to an external force?
What does the area under a Force-displacement graph give us?
Work
What is the formula for horizontal component of Fg?
What type of collision results in objects sticking together after collision?
Totally inelastic collision
Which kinematics equation would I use if I wanted to find t?
Given: x, x0,v0, and a
x = x0 + v0t + 1/2*(at2)
Formula for work?
W = Fd
What is the derivative of velocity?
(Calculus question)
Acceleration
What is the difference between static friction and kinetic friction?
Static friction: when object is at rest on a surface (not sliding)
Kinetic friction: when object is sliding
What equation do we use when discussing conservation of momentum?
p1 + p2 = p1' + p2'
In free fall, what is ax? ay?
ax = 0 m/s2
ay = -10 m/s2
What are 2 external forces we discussed that cause energy to be dissipated?
Friction and air resistance
Relating to calculus terms:
What is another word for "slope"?
What is another word for "area under graph"?
Slope = derivative
Area under curve = integral
What is the formula for magnitude of a force?
F2 = Fx2 + Fy2
The area under what type of graph gives us impulse?
Force time graph
What does area under a velocity-time graph give us?
Displacement
What does it mean for friction to be "negligible"?
Friction is irrelevant. We do not consider friction if the problem tells us it is negligible.
What is the formula for work in 2D?
W = Fdcos(theta)
Visual in 2.07 Notes
What do we know about Vcm in a closed system?
Vcm=center of mass velocity
It will remain constant
What 3 things do we know about an object in equilibrium?
1. v = 0 m/s or is constant
2. a = 0 m/s2
3. Fnet = 0 N