An object on a straight line travels from point A to point B at a constant speed of 60 kmh-1 and returns to point A at a constant speed of 50 kmh-1. What is the average velocity for total motion? 1) 60 kmh-1
2) 55 kmh-1
3) 52.5 kmh-1
4) 50 kmh-1
5) 0
please help me...

Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?

Which of the following are not typically included in the periodic table? a. atomic mass b. element symbol c. isotopes d. number of electrons

Hey student studies gravity using objects that have the same mass which two objects have the greatest gravitational force acting between them a. 100kg 1.0m 100kg b. 100kg 2.0m 100kg c. 100kg 2.0m 100kg big d. 100kg big 3.0m 100kg big