PH 192 Physics I Recitation
Pettit
3
Two-Dimensional Kinematics Part I
1. You throw a ball toward a wall with a speed of 25 m/s and at an angle of 40o
above the horizontal. The wall is 22 m from the release point of the ball.
a. How far above the release
PH 192 Physics I Recitation
Pettit
Exam 2 Review
Exam 2 Review Questions
Note: The magnitude of numerical answers is given in parentheses.
1.
Suppose that a 1 kg standard body accelerates at 4.00 m/s2 at 160o from the positive direction of the xaxis, owin
PH 192 Physics I Recitation
Pettit
Exam 1 Review
Exam 1 Review Questions
Note: The magnitude of numerical answers is given in parentheses.
1. A particles position is given by the expression x = 4 12t + 3t2.
a. What is the particles velocity at t =1 s? (6
PH 192 Physics I
Recitation
1
Pettit
One-Dimensional Kinematics - Part II
1. A pilot is flying horizontally at a height of 35 m above the ground at a speed of
1300 km/h. The ground suddenly begins to slope upward at 4.3o (difficult to
detect visually). Ho
PH 192 Physics I Recitation
Pettit
Exam 3 Review
Exam 3 Review Questions
Note: The magnitude of numerical answers is given in parentheses.
1.
A 0.70 kg ball is moving horizontally with a speed of 5.0 m/s when it strikes a vertical wall. The ball rebounds
PH 192 Physics I Recitation
Pettit
Dot (Scalar) Product and Cross (Vector) Product
1. Use the definition of the scalar product A B A B cos to calculate the angle
between the two vectors given by A 3.0i 3.0 3.0k and
j
B 2.0i 1.0 3.0k .
j
c
5
3
b
4
a
2.
PH 192 Physics I Recitation
Pettit
4
Circular Motion
1. A boy whirls a stone in a horizontal circle of radius 1.5 m and at a height 2 m
above level ground. The string breaks, and the stone flies off horizontally and
strikes the ground after traveling a ho
PH 192 Physics I Recitation
Pettit
13
Momentum Conservation
1.2 kg
1.8 kg
0.630 m/s
1.40 m/s
1. A 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless tabletop.
The bullet passes through the first block, with mass 1.20 kg, and embed
PH 192 - Physics I recitation
Pettit
6
Friction
h
R
1. A worker wishes to pile a cone of sand onto a circular area in his yard. The radius
of the circle is R, and no sand is to spill onto the surrounding area. If s is the
static coefficient of friction be
PH 192 Physics I Recitation
Pettit
11
More Energy
m
1. A 2.00 kg block is placed against a spring on a frictionless 30.0o incline. The
spring, whose spring constant is 19.6 N/cm, is compressed 20.0 cm and then
released.
a. What is the elastic potential en
PH 192 Physics I recitation
Pettit
5
Forces
1. Three astronauts, propelled by jet packs, push and guide a 120.0 kg asteroid
toward a processing dock, exerting forces of 32.0 N at an angle of 30.0o above the
positive x-direction, 55.0 N along the positive
PH 192 Physics I Recitation
Pettit
10
Energy
P
h
R
Q
R
1. A small block of mass m can slide along a frictionless loop-the-loop. The block is
released from rest at point P, at a height h = 5R above the bottom of the loop.
a. How much work does the gravitat
PH 192 Physics I
Recitation
1
Pettit
One-Dimensional Kinematics
1. A proton moves along the x-axis according to the equation x = 50t + 10t2 (x is in
meters and t is in seconds). Calculate:
a. The average velocity during the first 3 s.
b. The instantaneous
PH 192 Physics I Recitation
Pettit
3
Two-Dimensional Kinematics Part II
1. An airplane, diving at an angle of 53o with the vertical, releases a projectile at an
altitude of 730 m. The projectile hits the ground 5 s after being released.
a. What is the spe
PH 192 Physics I Recitation
Pettit
2
Vectors
1. For the vectors a (3m)i (4m) and b (5m)i (2m)
j
j
a. give a b
i. in unit-vector notation
ii. as magnitude and direction (relative to i )
b. give b a
i. in unit-vector notation
ii. as magnitude and directi