Can Centre of mass of a body lie where there is absolutely no mass?

Can Centre of mass of a body lie where there is absolutely no mass?

Solution : Yes, it can. For example, centre of mass of a uniform circular ring lies at the centre of the ring, where there is no mass.

Can a body inside an artificial satellite have Centre of mass?

Can we determine the gravitational mass of a body inside an artificial satellite? No, artificial satellite is like a freely falling body and the weight of the body inside the satellite is zero.

Is it necessary that a mass should be present at the Centre of mass?

no, It’s not necessary that a mass should be present at the centre of mass of any system. hence, centre of mass is located at (0,0) . here it is clear that each tiny particle doesn’t present in origin but centre of mass of whole system of particles present in origin.

Does the Centre of gravity always lie within the body?

Centre of Gravity in the Human Body In the anatomical position, the COG lies approximately anterior to the second sacral vertebra. However, since human beings do not remain fixed in the anatomical position, the precise location of the COG changes constantly with every new position of the body and limbs.

When the distance between two masses is doubled the gravitational attraction between them will be?

So as two objects are separated from each other, the force of gravitational attraction between them also decreases. If the separation distance between two objects is doubled (increased by a factor of 2), then the force of gravitational attraction is decreased by a factor of 4 (2 raised to the second power).

Where does a body weigh more at surface of Earth or in a mine?

Weight of any body is maximum at the Earth’s surface. As we approach the core or go farther away from it, the weight of the body decreases. Therefore, a body will weigh more on the earth’s surface than deep within an underground mine.

Why is gravitational potential energy negative?

Gravitational potential energy is negative at the surface of Earth, because work is done by the gravitational field in bringing a mass from infinity i.e work has to be done on a body, if it is taken away from the gravitational field of the earth. Thus, potential energy is negative.

What is the symbol for gravitational potential energy?

Gravitational potential energy is usually given the symbol U g U_g Ug​U, start subscript, g, end subscript. It represents the potential an object has to do work as a result of being located at a particular position in a gravitational field.

Are gravity wells real?

A gravity well is the pull of gravity that a large body in space exerts. The larger the body (the more mass) the more of a gravity well it has. The Sun has a large (or deep) gravity well. Asteroids and small moons have much shallower gravity wells.

What are the units of gravitational potential energy?

Since the force required to lift it is equal to its weight, it follows that the gravitational potential energy is equal to its weight times the height to which it is lifted. PE = kg x 9.8 m/s2 x m = joules.

How do you calculate peak watts?

Divide the energy per pulse by the pulse width (in time) and you will get the peak power.