This "push off" doesn't happen when ordinary objects like balls or rocks... collide?
How do we find with help of kinetic energy formula, maximum possible change of momentum in an isolated system?
hello. If in isolated system two objects (one wih momentum 6 and the other with momentum 3)collide, total momentum of the system always remains the same (total_momentum=9).
Depending on the mass, material of objects and some other variables, the change of momentum could vary. Does maximum...
But WHY does formula always give you the distance to the center of a mass ? So far I only have your word (and book's )that no matter where the axis is, the torque will always be as if the whole mass is at the center of mass
No, you misread my post. I already understood everything you explained! What I don't understand is how or why no matter where the axis is the magnitude of torque m*g*X is always as if the whole mass of a body is pulling from center of mass. I realize that
X = (x_1 m_1 + x_2 m_2)/m
always...
hello
I'm learning about torques and got really stuck. I hope someone can take the time and help me out with this
When calculating the torque caused by the weight of an object, no matter where we put the axis of rotation, the magnitude of torque m*g*X is always as if the whole mass of a...
What does a_{cm} mean? Acceleration of a part of an object that is 1 cm in length?
If that is the case, then M\vec{r}_{cm} must mean torque of a part of the body that is 1 cm in length?
Isn't that a formula for finding how far from the rotation axis a center of mass is? Aren't rotational...
Why when we throw an extended object like a baseball bat will the center of mass follow the same parabolic path that we expect for a smaller obeject like ball, while the bat itself will rotate around this ceneter of mass?
Why does center of mass behave like a simpler object?
thank you
So a sum of all forces equals zero for a body standing still or moving with constant velocity , but still net torque may not be equal equal to zero ?
I though there was a law saying something to the effect : "if an object is not pushed or pulled upon, or is standing still, then the sum of...
hiya
Newton's law says if an object is not pushed or pulled upon, its velocity will naturally remain constant, or body will remain standing still
But is this only true if the sum of all torques is also zero?
If we pull on wheel (its axis attached to something so it doesn't fall down )...
I will read it thanx
But I still am not shure how much of this stuff do I actually have to know ...meaning how deep must I go ( first year of high school ) ?
greetings
If we throw an object in straight line this objects travels in parabolic path until it hits the ground.
But in fact this parabola is only a part of an ellipse that object would travel in and center of the Earth is one of the foci points
I understand that object can circle around...