When landing after a spectacular somersault, a 40.0 kg gymnast decelerates by pushing straight down on the mat. calculate the force she must exert if her deceleration is 7 times the acceleration of gravity?

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02-10-2017
Physics

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When landing after a spectacular somersault, a 40.0 kg gymnast decelerates by pushing straight down on the mat. calculate the force she must exert if her deceleration is 7 times the acceleration of gravity?

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vvb vvb · Answer 1 · 2017-10-09T10:38:03+02:00

vvb vvb

09-10-2017

The force of the gymnast on the mat comes from the second law of physics
[tex]F=m*a[/tex] where the acceleration is given as
[tex]a=7*g =7*9.81 =68.67 (m/s^2)[/tex]
Therefore the force is
[tex]F=40*68.67 =2746.8 N [/tex]

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