Question

Define

1 )Density

2 Speed

1. Mechanical energy​

Answer 1

Answer:

DEFINE —

1) Density:- Density is a measure of mass per volume. The average density of an object equals its total mass divided by its total volume. An object made from a comparatively dense material (such as iron) will have less volume than an object of equal mass made from some less dense substance (such as water).

2) Speed:- In everyday use and in kinematics, the speed of an object is the magnitude of the change of its position; it is thus a scalar quantity.

3) Mechanical Energy:- The energy acquired by the objects upon which work is done is known as mechanical energy. Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy (energy of motion) or potential energy (stored energy of position).

Explanation:

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Answer 2

Answer:

1)DENSITY:—Density, mass of a unit volume of a material substance. ... Density offers a convenient means of obtaining the mass of a body from its volume or vice versa; the mass is equal to the volume multiplied by the density (M = Vd), while the volume is equal to the mass divided by the density (V = M/d).

2)SPEED:—In everyday use and in kinematics, the speed of an object is the magnitude of the change of its position; it is thus a scalar quantity.

3)MECHANICAL ENERGY:—mechanical energy is the sum of potential energy and kinetic energy. It is the macroscopic energy associated with a system. The principle of conservation of mechanical energy states that if an isolated system is subject only to conservative forces, then the mechanical energy is constant.