What does the heliocentric model of the solar system state?

a- all of the planets and the sun orbit earth

b- only the moon and earth orbit the sun

c- earth and the other planets orbit the sun

Aferris wheel is a vertical, circular amusement ride with radius 9 m. riders sit on seats that swivel to remain horizontal. the ferris wheel rotates at a constant rate, going around once in 9 s. consider a rider whose mass is 56 kg. at the bottom of the ride, what is the perpendicular component of the rate of change of the rider's momentum? at the bottom of the ride, what is the vector force exerted by the seat on the rider?

What is the length x of the side of the triangle below? (hint: use the cosine function)

Simple machines can a. increase force only b. decrease force only c. increase or decrease force