How will we figure out the pressure on the ground exerted by a ballerina?
1 Answer
Explanation:
As an object falls from rest, its gravitational potential energy (PE) is converted to kinetic energy (KE).
CASE: Consider a ballerina with mass "m" who is falling
The ballarina is falling from highest reached (rest), therefore initial kinetic energy is zero (KE = 0). Once the ballarina hit on the ground, height is zero, therefore no potential energy at ground level (PE = 0).
The work performed by the ballarina is:
But, Work = Force x distance
Combining "W" equations and solving for F
By definition, Force = Pressure x Area
Combining both equations of F and solving for P:
"
PE = KE
Finally,
Where,