Object a has mass m and is traveling forward with speed v. which set of changes to object a will not affect its momentum?
mass reduced to 0.5m, speed increased to 2v

mass reduced to 0.25m, speed increased to 1.25v

mass increased to 2m, speed increased to 2v

the direction of velocity reversed, speed kept at v

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

How many neutrons does plutonium -196 with an atomic number of 78.