An auto, starting from rest, undergoes constant acceleration and covers a distance of 1200 meters. the final speed of the auto is 60 meters/sec. how long does it take the car to cover the 1200 meters?

What properties of a moving object are used in determining the object's energy of motion

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

Definition: this is the weighted average of all of the isotopes of an element.