What can I do to increase range of motion in a joint

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above

Of is j/kg·k. if a 2.6 kg of isk to k,is ?