Question

Colculate the kinetic energy of a bus of mass 10000kg moving with speed of 108 km/h​

Answer 1

Answer:

Formula of kinetic energy is 1/2 mv^2

Answer 2

Answer:

The kinetic energy of a bus of mass 10000kg moving with a speed of 108 km/h​ will be $4500000 J$

Explanation:

The energy possed by a moving object is called kinetic energy.

We have the expression for kinetic energy (K.E) as,

$K.E = \frac{1}{2} mv^{2}$ ...(1)

where m is the mass of the moving object and v is the velocity of the object.

From the question,

Mass of the bus (m) = 10000kg

speed of the bus (v) = 108 km/hr

Convert km/h into m/s by multiplying the velocity with $\frac{5}{18}$

$v = 108 \times \frac{5}{18}$

  $= 30 m/s$

Substitutes these values into the equation(1).

$KE = \frac{1}{2}\times 10000\times 30^{2}$

        $= 4500000 J$