Question

you are a gymnast of mass 72 kg, initially hanging at rest from a bar. you let go of the bar and fall vertically 92cm to the floor below. upon landing, you bend your knees, bringing yourself to rest over a distance of 35cm. the floor exerts a constant force on your body as you slow down. Determine your speed at impact, and the magnitude of the force the floor exerts on you as you slow down.

Answer 1

So recall that the gravitational energy is converted to kinetic energy.

so, (72kg)(9.81 m/s^2)(0.92m) = 1/2(72kg)(v^2) so solve for v

= squareroot**[ 649.152/36) = 4.246 m/s down. That is the speed at impact.

@genius12 could you do the rest I have to go eat. ..