A student is sitting on the right side of a school bus when it makes a right turn. We know that the force of gravity acts downwards and a normal force from the seat acts upwards. If the student stays in place when the bus turns, we also know that there must be
a. no other force on the student.
b. a force parallel to the seat directed forward on the student.
c. a force parallel to the seat directed to the left on the student.
d. a force parallel to the seat directed to the right on the student.
e. a force parallel to the seat in a direction between forward and left on the student.
d
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