Lulu wants to swing a 0.10-kg Twinkie tied to one end of a cord in a horizontal circle of radius 0.50 m with a tangential speed of 0.20 m/s. What centripetal force must she exert on the mass through the cord?

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

What are known as the properties of substances that describe a substance et does not change that substances?