The friction of the air causes vertical retardation equal to one-tenth of the acceleration due to gravity (take g = 10 m/s^2). Find the decrease in the time of flight. The friction of the air causes vertical retardation equal to one-tenth of the acceleration due to gravity (take g = 10 m/s^2). Find the decrease in the time of flight. September 19, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related