Question

A fire woman dropped a person onto the safety net. Right

before the person hit the net he had a velocity of 11.2 m/s and
1800 J of kinetic energy. What was the mass of the person?

Answer 1

m = 28.7[kg]

Step-by-step explanation:

To solve this problem we must use the definition of kinetic energy, which can be calculated by means of the following equation.

`E_(k)=(1)/(2)*m*v^(2)\\`

where:

Ek = kinetic energy = 1800 [J]

m = mass [kg]

v = 11.2 [m/s]

`1800=(1)/(2)*m*(11.2)^(2)\\m = 28.7[kg]`