Astudent of weight 627 n rides a steadily rotating ferris wheel (the student sits upright). at the highest point, the magnitude of the normal force on the student from the seat is 563 n. (a) what is the magnitude of at the lowest point? if the wheel's speed is doubled, what is the magnitude fn at the (b) highest and (c) lowest point?

a)Net force = 691 N

b)Net force = 371 N

c)Net force = 883 N

Explanation:

Weight= 627 N

At the highest point

Net force = Centripetal force + weight

At the highest ,Net force = 563 N.

So

Centripetal force(Fc) = 563 - 627 N

Fc= - 64 N

Negative sign means force is upward.

But at the lowest point

Fc=  64 N

Net force = Centripetal force + weight

Net force = 64 + 627

Net force = 691 N

When speed will become double

We know that

Then the force Fc will become 4 times.

Fc'= 4 Fc

F'c= 4 x 64 N

F'c= 256 N  

So new Centripetal force'= 256 N  

At the highest point

Net force = Centripetal force' + weight

At the highest point

Net force =-256 + 627

Net force = 371 N

At the lowest point

Net force = Centripetal force' + weight

Net force = 256 + 627

Net force = 883 N

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.