AP Physics 1 – 1st Semester Midterm Review
1. Incline Plane with friction.
2. Coupled motion - Free body diagrams and pulleys, tension, acceleration
2. Graphing – contains some of these: displacement vs time, velocity vs time, force vs accl, force vs displacement
Also contains some of these: f = ma, motion equations, W = f.d, W = KE, p = m.v
Cheat sheets allowed! 3 questions (#1 - 5 parts, #2 - 6 parts, #3 - 5 parts) 55 minute time limit.
Might wanna practice Ch3 #18, Ch4 HW#3 2,3, Ch4 #49, 50, Ch4 HW#8 #1 below.
AP Physics 1 – 1st Semester Final Exam Review
Rev #1 Ch2 #23,27,71,78
Ch3 #18,47,82,93
23. Figure P23 is a plot of the speed of a cat versus time.
How far did the cat travel during the third second of its journey?
What were its maximum and minimum speeds?
When, if ever, was its speed a nonzero constant?
27. Figure P27 shows the distance traveled versus time for a toy car.
What was the toy car’s ave speed during the time interval from 2.0 s to 8.0 s?
71. A toy electric train runs along a straight length of track. Its displacement vs
time curve is shown. Is the train’s velocity ever const and if so, when?
What is its inst vel at t = 2.0s and at t = 6.5s? Did it change direction, when?
78. A trolley runs along a straight run of track the graph is the plot of its vel vs
71. 78.
time. Approx how far did it travel in the first 3.0 s of its journey?
How far from starting point is it at t = 6.0 s?
18. Fig P18 is a vel-time graph for a test car on a straight track. The test car
initially moved backward in the negative x-direction at 20 m/s. It slowed,
came to a stop, and then moved off in the positive x-direction at t = 2.0 s.
What was its ave accl during each of the time intervals 0 to 0.5 s, 1.5 to 2.0 s,
and 2.0 to 2.5 s? What was its instantaneous acceleration at t = 2.25 s?
47. The length of a straight tunnel through a mountain is 25.0 m. A cyclist heads directly toward it, accelerating at a constant rate of
0.20 m/s2. If at the instant he enters the tunnel he is traveling at a speed of 5.00 m/s, how fast will he be moving as he emerges?
82. An arrow is launched vertically upward from a crossbow at 98.1 m/s. a) What is the inst speed at the end of 10 sec?
b) What is its ave speed to that moment? c) How high has it risen?
d) What is the inst accl 4.10 sec into flight?
93. A raw egg is thrown horizontally straight out of the open window of a fraternity house. If its initial speed is 20 m/s and it hits
ground 2.0 s later, at what height was it launched?
Rev #2 Ch4 #25, 27,Ch4 HW#3 2,4, 71,78, Ch4 HW#8 #1, Ch4 HW#10 #3
25. A kid on an old dirt bike is being pushed along at constant speed by her father w/ 10N force downward at 30°.
Combined mass of kid+bike is 30kg, find the total retarding force.
27. A 100kg gentleman standing on slippery grass is pulled by his two rather unruly children. One tugs him with a force of 50N north,
while the other hauls with 120N east. If friction is negligible, what is the man’s accl?
Ch4 HW#3) A 100kg person stands on a bathroom scale in an elevator. Draw and label the forces present, set up an Fnet equation, and
solve for what the bathroom scale reads in each picture.
2) a = 2 m/s2 downward
4) a = 2 m/s2 upward
49. A 2000kg car at the top of a 20° incline driveway rolls freelydownhill. At what speed will it hit the garage door 20m down?
50. A rescue helicopter lifts 2 people from the sea on an essentially weightless rope. Jamey (100 kg) hangs 15 m below Amy (50.0 kg),
who is 5 m below the aircraft. What is the tension: a. On the top part of the rope? b. Middle?
c. Repeat with the helicopter accl at 9.81 m/s2 upward.
71. Find the acceleration of the system, and the tension in each rope.
Friction is negligible.
Ch4 HW#8 #1) A block slides down a carpeted incline plane
angled at 45 at a constant speed. What is the coefficient
of kinetic friction between the block and the plane?
Ch4 HW#10 #3) A 15g mass hangs over the edge of a table.
It is attached to a 25 g mass, on the table, with an unknown
coefficient of kinetic friction. If the system is moving
at constant speed, what is the value of the coefficient?
Rev #3 Ch6 Ch6 HW#2 #1, 74,78, Ch7 #13,47,54
Ch6 HW#2 #1) A force is gradually placed on an object, uniformly increased
to 20 N over a distance of 5 m. It then stays constant for the next 5 m.
How much work was done on this object?
74. An inclined plane at 30.0º is 6.40 m long. A book, which has a kinetic
coefficient of friction with the incline of 0.20, is placed at the top and
immediately begins to slide. Using energy considerations, how long
will it take for the book to reach the bottom of the incline?
78. How much power does it take to raise an object weighing 100N a distance
of 20.0m in 50s?
13. A 47 g golf ball is hit in the air at 60 m/s. It lands in sand at the same elevation and comes to rest in 10 ms. Ignoring air friction,
what was the average force the sand exerted on the ball?
47. A 1263 kg sports car traveling south at 11.6 m/s crashes head-on into a 1742 kg cab moving north at 25 m/s. If the two cars
remain tangled together but free to coast, describe their motion immediately after collision.
What is their final speed? How much kinetic energy is lost?
54. Two identical blocks, each of mass 10.0 kg, are to be used in an experiment on
a frictionless surface. The first is held at rest on a 20.0° inclined plane 10.0m
from the second, which is at rest at the foot of the plane.
a. What is speed of m1 at bottom of incline?
b. m1 slams into and sticks to m2 what is their speed immediately after impact.
c. In exp, they don’t stick, m2 = 6.1 m/s. m1 speed?
Rev #4 Ch5 #5,37, Ch5 HW#4 #3, Ch8 #49,68,69, 2 Ch8 Bonus questions
5. 700kg flat track car rounds a corner of radius 30m at a speed of 20m/s, without slipping.
What is the minimum coeffiecient of static friction that can accomplish this?
37. The acceleration due to gravity on the surface of mars is 3.7 m/s 2. If the planet’s diameter is 6.8x106 m, determine the mass of the
planet and compare it to Earth.
Ch5 HW#4 #3) A scale is fitted in the seat of a roller coaster car and a person
weighing 800 N sits down on it. The car then descends along a path
that has the shape of a 100.0 m radius vertical circle.
What is the maximum reading of the scale? What is minimum reading of scale?
49. A wheel is revolving at 20 rad/s when a brake is engaged and the wheel
is brought to a stop in 15.92 rev. How much time elapsed
and what was the angular deceleration?
68. The bridge has a uniform weight of 20.0 kN. Calculate forces a, b.
69. The beam is of negligible mass, what value does the scale read?
1. A solid steel cylinder of mass 10M and radius R is mounted as shown.
Around the cylinder is wound a rope. A mass M is attached to the rope.
All friction is negligible. What is the accl of mass M and what is the
tension in the rope?
2. A solid sphere of mass M rolls without slipping down a long
curved track from a height of 1.0 m.
Calculate the linear speed with which it leaves the track.