Question 1206077
(1.2-h)=  cos 22 deg*1.2

1.2 -h = 1.1126

h= 1.2- 1.1126 

h= 0.0874 m

PE = m*g*h 

PE = 2*10*0.0874

Potential energy =1.748 J


At the bottom of the swing, all of the potential energy will be converted into kinetic energy. 

KE = 1/2 m v ^2

K E = 1.748= 1/2  *2*v^2

1.748 = 1/2* 2*v^2

v= 1.322 m/s  the velocity of the pendulum through the bottom of its swing

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