Question

(a) Define energy
(b) State the mathematical expression of work
(c) State two examples when a force acting on a​

Answer 1

Answer:

Explanation:

a)In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object.

b)Mathematically, work can be expressed by the following equation.

W = F • d • cos Θ

where F is the force, d is the displacement, and the angle (theta) is defined as the angle between the force and the displacement vector.

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Answer 2

Explanation:

ans a) the strength and vitality required for sustained physical or mental activity.power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines.

ans b) The work is calculated by multiplying the force by the amount of movement of an object (W = F * d). A force of 10 newtons, that moves an object 3 meters, does 30 n-m of work. A newton-meter is the same thing as a joule, so the units for work are the same as those for energy – joules.

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