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

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

Explanation:

i believe it is b. what was the cause of the big bang

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the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer