This exam consists of 25 questions; 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 110. When the exam was given, the mean
was 89.1; the median was 92. Click here to see the formula sheet that came with the exam.
(a) 16.7 s
(b) 17.25 s
(c) 9.8 s
(d) 35.4 s
(e) 12.9 s
A football player moves along a straight-line path to catch a ball
thrown by the quarterback. The graph shows the speed as a function of
time. Calculate the acceleration at 1 s, 2.5 s and 4 s.
(a) 0 m
(b) 2 m
(c) 4 m
A ball is thrown upward from the ground at an initial angle of
60° with respect to the horizontal and with an initial speed
of 30 m/s. How high does the ball rise above the ground?
(a) 34.4 m
(b) 15.4 m
(c) 9.8 m
(d) 25.0 m
(e) 12.5 m
(a) 1.4 s
(b) 7.2 s
(c) 5.3 s
(d) 8.7 s
(e) 6.5 s
(a) the same.
A boat starts out on one bank of a river and heads directly across
the river at a constant velocity of 5 m/s relative to the water. The
river flows with a uniform velocity of 3 m/s. The river is 75 m wide.
How far downstream from the original position does the boat cover while
crossing to the opposite bank of the river
(a) 0 m
(b) 75 m
(c) 45 m
(d) 125 m
(e) 20 m
(a) 8 m/s
(b) 2 m/s
(c) 6 m/s
(a) ball A
(b) ball B
(c) they have the same speed as they hit the ground
A 1200-kg car (which you may approximate as a point object) rounds a
circular curve of radius R = 45 m. If the coefficient of static friction
between the tires and the road is µs = 0.82,
what is the maximum speed the car can have in the
curve without the tires slipping?
(a) 25.2 m/s
(b) 11.8 m/s
(c) 15.8 m/s
(d) 19.0 m/s
(e) 30.6 m/s
(b) 1.414 V
(c) 2 V
A block of mass 4.0 kg is sitting on a horizontal frictionless surface
and is pulled with a rope that makes an angle of 30° with the
horizontal, as shown in the drawing below. The tension in the rope is
25 N. What is the acceleration of the block along the surface?
(a) 5.41 m/s2
(b) 7.81 m/s2
(c) 2.24 m/s2
(d) 3.54 m/s2
(e) 8.42 m/s2
(a) FN > W
(b) FN = W
(c) FN < W
(a) greater than Mg.
(b) equal to Mg.
(c) less than Mg.
Block A of mass 2 kg and block B of mass 4 kg are attached to each
other by a string. The two blocks are sitting on a horizontal
frictionless surface. Another string is attached to block B and the
whole system is pulled to the right so that both blocks accelerate
together, as shown in the figure. If the tension T is 15 N, as shown in
the figure, what is the tension T1 in the string connecting
the two blocks?
(a) 1 N
(b) 3 N
(c) 5 N
(d) 12 N
(e) 15 N
(c) the same.
A block of mass M = 6 kg slides down an incline at constant velocity.
The incline makes an angle of 40° with respect to the horizontal, as
shown in the figure. What is the coefficient of kinetic friction
between the block and the incline?
A horizontal force of 10 N pushes a block against a vertical wall,
holding it in place as shown in the figure. The coefficient of static
friction between the block and the wall is
µs = 0.59. How many different
forces act on the block?
(a) 2.4 kg
(b) 9.8 kg
(c) 3.0 kg
(d) 0.6 kg
(e) 10 kg
Block A of mass 50 kg rests on a horizontal frictionless tabletop. A
horizontal string is attached to A and passes over a massless,
frictionless pulley and attaches to block B of mass 30 kg, as shown in
the figure. Block A is held in place by hand so that the whole system
is at rest. What is the tension in the string?
(a) 108 N
(b) 123 N
(c) 168 N
(d) 147 N
(e) 294 N
(c) the same
(a) the one further from the center of the earth
(b) the one closer to the center of the earth
(c) they both have the same speed