True-false questions are worth 2 points each, three-choice multiple
choice questions are worth 3 points each, five-choice multiple choice
questions are worth 6 points each. The maximum possible score is 114.
The exam period was 90 minutes; the mean score was 88.1; the median
score was 91. Click here to see page1
page2 of the formula sheet that came
with the exam.
A car moves with velocity v0= 12 m/s on a slick
road when the driver applies the brakes. The wheels slide and it takes
the car 4 seconds to stop with a constant deceleration.
Which of these pairs of graphs correctly shows the displacement and
the velocity of the car during the time when it decelerates?
(a) 12 m
(b) 24 m
(c) 48 m
(a) greater than half the total distance required to stop.
(b) half the total distance required to stop.
(c) less than half the total distance required to stop.
Three strings hold a block of mass M in place, as shown in the figure
above. The string on the upper right pulls with a force of 141.0 N. The
string on the lower right pulls with a force of 14.1 N. Gravity points
in the -y direction.
What is the magnitude of the tensionTL in the
string on the left?
(a) 90 N
(b) 100 N
(c) 110 N
(d) 127 N
(e) 155 N
(a) 5.2 kg
(b) 7.0 kg
(c) 9.2 kg
(d) 12.7 kg
(e) 15.5 kg
(a) -10.0 N
(b) 0.0 N
(c) 10.0 N
A block of mass 15 kg hangs on a massless string connected via a
pulley to a block of mass 40 kg, which rests on a 30° incline, as
There is static friction between the incline and the 40 kg block.
The two blocks remain at rest. The static friction coefficient
μs must be at least
(a) The 40 kg block will slide down the incline, pulling the 15 kg block up.
(b) The blocks will stay at rest.
(c) The 15 kg block will fall down, pulling the 40 kg block up the incline.
(a) 110 m/h
(b) 280 m/h
(c) 340 m/h
(d) 390 m/h
(e) 410 m/h
(a) The force of the Mars Rover pulling on the rock and the
frictional force between the rock and the Martian surface.
(b) The normal force on the rock by the Martian surface and the
gravitational force of Mars on the rock.
(c) The gravitational force of Mars on the rock and the gravitational force
of the rock on Mars.
(a) The elevator is speeding up.
(b) The elevator is slowing down.
(c) There is not enough information to tell.
(a) 2145 N
(b) 3136 N
(c) 4166 N
(a) 10.2 m/s2
(b) 15.6 m/s2
(c) 18.4 m/s2
(d) 19.3 m/s2
(e) 22.8 m/s2
A cannon fires a cannon ball at an
angle of 25°, measured from the ground as shown. At the moment the
cannon ball is fired, the y component of its velocity, vy0,
is 8.45 m/s. The cannon ball lands 31.25 m away.
What is vx0, the x-component of the cannon
ball's initial velocity?
(a) 8.5 m/s
(b) 10.2 m/s
(c) 13.4 m/s
(d) 16.1 m/s
(e) 18.1 m/s
(a) 0.44 m
(b) 1.57 m
(c) 2.98 m
(d) 3.64 m
(e) 4.02 m
(a) 8.45 m/s
(b) -8.45 m/s
(c) 10.05 m/s
(d) -10.05 m/s
(e) 20 m/s
You are riding on a northward-bound train, which is moving at a speed
of 30 mi/hr. You walk South with speed 3 mi/hr with respect to the
train. Your speed with respect to the ground would be
(a) 3 mi/hr
(b) 27 mi/hr
(c) 30 mi/hr
(d) 33 mi/hr
(e) Can't tell from the information given.
(a) 29.52 m/s
(b) 30.98 m/s
(c) 31.06 m/s
(d) 32.19 m/s
(e) 33.05 m/s
Olivia is riding on a roller coaster, which moves at constant speed
throughout the ride. Unfortunately, the attendant forgot to lock her in
before the roller coaster departed, and now she is headed for a loop of
radius 20 m.
What is the minimum speed of the roller coaster on top of the loop
such that Olivia does not fall out at the top of the loop?
(a) 2 m/s
(b) 6 m/s
(c) 10 m/s
(d) 14 m/s
(e) 21 m/s
(a) 407 N
(b) 612 N
(c) 827 N
(d) 936 N
(e) 1042 N
Harvey is riding a carnival ride which consists of a cylindrically
shaped room of radius R = 8 m rotating on its axis with angular
velocity ω. Harvey's mass is 85 kg. The floor drops out from
below Harvey's feet, and he sticks to the wall rather than descending
with the floor. The coefficient of static friction of the wall,
μs = 7.66 .
The angular velocity must be at least
(a) 0.10 rad/s
(b) 0.25 rad/s
(c) 0.40 rad/s
(d) 0.55 rad/s
(e) 0.66 rad/s
(a) ω would have to be twice as large.
(b) ω; could be half as large.
(c) ω would not need to change.