For a moving object, the force acting on the object varies directly with the object's acceleration. When a force of 81 N acts on a certain object, the acceleration of the object is 9 /ms2 . If the acceleration of the object becomes 2/ms2 , what is the force?

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

What would people living along the coast in south florida do if there was a hurricane warning? move to locations away from the water flock along coasts to watch the natural phenomenon buy instruments to predict the exact location of the hurricane measure water levels to know the exact time of the hurricane

What practical value did astronomy offer to ancient civilizations?