Physics Exam 2

Consider a person standing in an elevator that is moving upward at a constant velocity. The normal force N exerted by the elevator floor on the person is...
A) larger than
B) smaller than
C) identical to
...the downward weight, W, of the person

Consider a person standing in an elevator that is accelerating upward. The upward normal force N exerted by the elevator floor on the person is...
A) larger than
B) identical to
C) smaller than
...the downward weight, W, of the person.

An object is held in place by friction on an inclined plane. The angle of inclination is increased until the object starts moving. If the surface is kept at this angle, the object...
A) speeds up
B) none of these
C) slows down
D) moves at a uniform speed

A 1500kg car travels at a constant speed of 22m/s around a circular track which has a radius of 80m. Which statement is true concerning this car?
A) The velocity of the car is changing
B) The car is characterized by constant velocity
C) The car is characterized by constant acceleration
D) The car has a velocity vector that points along the radius of the circle
E) More than one of the above is true