A75 kg firefighter climbs a flight of stairs 28 m high how much work does he do?

The amount of work done by the firefighter is equal to 20,580‬ Joules.

Given the following data:

Scientific data:

To determine how much work is being done by the firefighter:

The work done by a body is simply the product of the perpendicular force acting on the body and the distance it covers.

Mathematically, work done is given by the formula:

    ......equation 1.

But,   ......equation 2.

Substituting eqn. 2 into eqn. 1, we have:

Work done = 20,580‬ Joules

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20580 Joules of work is done by the firefighter.

Explanation:

Work done is defined as the force times distance travelled.

work=

Given:

mass= 75 kg

acceleration due to gravity =

h= height = 28 m

Putting in the values we get,

work=

Thus 20580 Joules of work is done by the firefighter.

the bal will not change its velocity.

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .