Which is the downward pull on an object due to gravity? volume mass weight matter

What is the maximum acceleration of the wing tips, in units of g?

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

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.