What is formula for time and velocity

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

To a of 4 x hz is 1. 0. mm nm nm

What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.