A cyclist and bike have a total mass of 105kg and a speed of 12m/s. Calculate the kinetic energy.

7560J

Explanation:

Given parameters:

Mass of cyclist and bike  = 105kg

Speed  = 12m/s

Unknown:

Kinetic energy  = ?

Solution:

The kinetic energy of a body is the energy due to the motion of a body.

 It is mathematically expressed as;

        K.E  = m v²

Insert the parameters:

      K.E  =   x 105 x 12²  = 7560J

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue