Atrain is travelling at 15m/s. it accelerates at 3m/s² for 20 seconds. how far does the train travel in this time?

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?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

This is the number of complete movements of a wave per second.