There are two planes. one is flying from new york to tokyo at a speed of 800 mph. the other is flying from tokyo to new york at a speed of 700 mph.

when the planes meet, which one will be closer to tokyo?

The force will determine the acceleration.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is