The center of mass of the system only accelerates, if external forces are acting on the system. If only internal forces are acting on the particles that make up the system, then the center of mass does not accelerate, its velocity remains constant. The total linear momentum of the system is conserved.
Q. How do you find the velocity of an object?
Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt.
Table of Contents
- Q. How do you find the velocity of an object?
- Q. What happens to center of mass in elastic collision?
- Q. How do you combine the center of mass?
- Q. Why does center of mass not move?
- Q. What is special about the motion of the center of mass?
- Q. Who has better balance males or females?
- Q. What factors can affect an object’s Centre of gravity?
- Q. What are two things that affect gravity?
Q. What happens to center of mass in elastic collision?
If you stand at the center of mass to observe an elastic collision, you see mass m1 approach with velocity V1(not the earth-frame-of-reference velocity v1 above), and mass m2 approaching with velocity V2. The masses collide at the center of mass (Ouch!). To do this, simply subtract vcm from each particle’s velocity.
Q. How do you combine the center of mass?
The center of mass can be calculated by taking the masses you are trying to find the center of mass between and multiplying them by their positions. Then, you add these together and divide that by the sum of all the individual masses.
Q. Why does center of mass not move?
The books states the answer as: “There is no interaction outside the system (no external force), therefore the center of mass will not move.”
Q. What is special about the motion of the center of mass?
The interesting thing about the center of mass of an object or system is that it is the point where any uniform force on the object acts. This is useful because it makes it easy to solve mechanics problems where we have to describe the motion of oddly-shaped objects and complicated systems.
Q. Who has better balance males or females?
Research appears to suggest that men score higher on balance tests than women (Erkmen, Taskin, Kaplan, & Sanioglu, 2009; Piech, Andzel, & Spaccarotella, 2015). In addition, young athletes have been shown to have better balance than non- athletes (Steinberg, 2016).
Q. What factors can affect an object’s Centre of gravity?
Factors That Influence the Strength of Gravity Newton’s law also states that the strength of gravity between any two objects depends on two factors: the masses of the objects and the distance between them. Objects with greater mass have a stronger force of gravity between them.
Q. What are two things that affect gravity?
When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.
