Question

What is the Kinetic energy of a 645 N woman jogging at 0.72 m/s squared

Answer 1

Kinetic energy of an object is given by

`KE = (1)/(2)mv^2`

here we know that

Weight of the woman is 645 N

so we will have

`W = mg = 645 N`

`m (9.8) = 645`

now we will have

`m = 65.8 kg`

also we know the speed of the woman as

`v = 0.72 m/s`

so the kinetic energy of the woman is given as

`KE = (1)/(2)mv^2`

`KE = (1)/(2)(65.8)(0.72^2)`

`KE = 17.1 J`

so kinetic energy will be 17.1 J