A 87 kg man has a total mechanical energy of 1780 J .If he is swinging downward and is currently 1.4 m above the ground, what is his speed? Use g = 10 m/s^2

6.4m/s

Explanation:

The total mechanical energy of the man is 1780J.

This mechanical energy is the energy due to the motion of the body and it is a form of kinetic energy.

 Also, mass  = 87kg

   Kinetic energy  =   m v²

m is the mass

v is the velocity

           1780  =   x 87 x v²

                v²  = 40.9

                v  = 6.4m/s

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

volts times amps 6 x 0.5 3w