A yo-yo's inertia...?
954443
Hi Yo-Yo!\nEnergy conservation law: m*g*h=E1+E2, m=0.12kg, h=1.2m, g=9.8m/s^2, E1 is translation kinetic energy, E2 is rotational kinetic energy.\nE1=m*v^2/2, v is translation speed at full length h, E2=I*w^2/2, w=angular speed at full length h.\nNow v=w*r, r=3.2*10^(-3) m, thus m*g*h=m*(w*r)^2/2+I*w^2/2, hence w=sqrt(2*m*g*h/(m*r^2+I)). Plug numbers in and find w & v (be a good boy!).\nMeanwhile v=a*t & h=a*t^2/2, ‘a’ is linear acceleration.\nThus t=v/a & h=a*(v/a)^2/2, so a=v^2/(2*h). Plug numbers in and find a & t. Angular acceleration being w’=a/r. My regards!
458965
I don't know...his Three laws of Motion? Something about inertia that an object in motion must stay in motion until acted on by another force. Something like that.
209689
mass in motion stays in motion unless disrupted by another force!
11142
Spin the other direction at the same speed for the same amount of time.
618210
Not due to gravitational pull?!
823386
Hi Alan the 1st!\nWe neglect the central aperture in CD, then inertia momentum is I=m*r^2/2 for any homogeneous disk, m=0.017kg, r=0.06m. Torq T=I*w’, w’ is angular acceleration, while w=w’*t, w=22 rad/s, t=0.88s, thus T=m*r^2*(w/t)/2, - plug in the proper numbers, be a good boy!
853764
he does has KE. if he doesn't , he wud be at rest in his seat if the brakes r applied suddenly. Observe this out from the bus. This's all bcoz of inertia of motion
906380
First problem: You have assumed all the mass of the meter stick is concentrated at the lower end; obviously, it is uniformly distributed along the length of the stick.  Assume that the mass is concentrated at the center; then, the length of the oscillator will be 0.865 meters, and the period should correspond.  There are some complications involving moment of inertia which I am ignoring.\nSecond problem: You may be solving for the wrong thing.  It looks like you are solving for the frequency of oscillation, rather than the maximum speed of motion.  Some careful work with units will help show you what is going on.
705306
none they work eccentrically in the down phase
757156
How about someone is run over by a car.  The owner of the car says they left it in neutral on a level parking lot, and must have forgot to set the parking brake -- the car started rolling forward before they could jump back in and stop it, and the car ran the victim over.\n\nThis can be disproven because Newton's first law (the "Law of Inertia") states that an object at rest will stay at rest until acted on by an outside force.  Since no outside force was present (the parking lot was level so no gravitational force acts to accellerate the car horizontally) and the car itself was turned off, it cannot possibly have "just started to roll by itself" -- the car owner intentionally ran the victim over.\n\nWhy would he do that?  Well I guess that will be the fun and imaginitive part of the assignment!
1179150
if you can picture a gyro spinning, picture it spinning out of control. or take a quarter and drop it on a table and watch it before it stops moving. it's all about speed. the rate of inertial is so grate the human eye can not see and regulate it at the same time.
347555
Depends also if it is muscle or fat.  The muscle can overcome the inertia & air friction.
778567
Constant speed means zero net force.  So what's balancing the air friction?
761342
We did something like this in my physics lab with an Atwood machine.  It was a pully with weights hanging from it.  I can't exactly remember how it worked, but maybe this will inspire you.  We also did something with an air track and these two masses colliding and we'd see which one would go in which diretcion.  You need a nearly frictionless surface, like an air hockey table or ice slab.
789436
inertia is a property of a body with mass... inertia is the resistance to motion....\n\nconservation of energy maybe...\nin the system stated, it's a non-elastic collision in which the like 99.9% of the energy of the first pool ball is transferred to the second pool ball.....\n\nthe situation is not clear.\nmoving first ball and moving second ball or one is at rest????
256564
Creates a lot of motion but doesn't take you anywhere?
628326
can't have vectors without motion.  Can't tell about inertia without motion.