A space station looks like a large wheel. the wheel rotates constantly. the inside of the wheel is the floor of the space station. this spinning motion simulates gravity. explain how this works. a) the spinning motion simulates the rotation of the earth
b) astronauts must push on the floor and apply force on it to make it move
c) all object in the space station require a force from the floor or they would not move
d) circular motion requires acceleration to change direction. this is created by a force that the floor exerts on objects on the inside of the wheel

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u.s. legal proceeding.)

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

Which boundary is associated with the building of the himalaya mountains? convergent transform divergent hot spot