Dawnelle prepares to dive off the 10m platform Her body mass

Dawnelle prepares to dive off the 10m platform. Her body mass is 57.4kg and her vertical ground reaction force is 1780N. What is the vertical acceleration of her center of mass?

Solution

Solution :

According to Newtons third law of motion every action has an equal and opposite reaction. So since the vertical ground reaction force when she lands is 1780N same amount of force is exerted by her center of mass.

And according to Newtons second law of motion

F = ma

1780 = 57.4 *a

a= 1780/57.4

a = 31.1 m/s²