Phys1220 Exam-3 Fall2015
1. A 20-kg block is released from rest at point A in the figure below. The track is frictionless
except for the portion between points B and C, which has a length of 6 m and its
coefficient of kinetic friction with the block is 0.
Questions
1. Describe how your observations would change if the
direction of the current were in the opposite direction.
The charges would be opposite of what they are
meaning they would be negative.
2. Describe how your observations would change if the
p
I.
Abstract (LTE)
It is known that metals usually expand when heat is
added and contract when cooled. The equation used to
prove this is DL=aLiDT. DL is the change in
length, a represents the coefficient of linear expansion, Li
the initial length, and DT
Exam Spring Practice
How long does it take for a train traveling 60.4 miles per hour
to travel 81 miles? Hints: your answer should have the correct
significant figure.
a. 1.34 hours
b. 1 hour
c. 0.75 hours
d. 1.3 hours
e. 0.745 hours
A stone is thro
1. The period of the pendulum is not dependent on mass, so
it would not matter whether it was doubled or halved.
Tension
2.
Mass x
gravity
(weight)
- (Mass*gravity)*sin (theta)
3. The formula to solve for this is T= M*g*Cos (theta)
T= 0.75*9.
What you absolutely have to know about
Thermodynamics
Thermodynamics is the most universally applicable branch of science.
It is used in Physics, Chemistry, Biology, Astronomy, Environmental Science.
Thermodynamics is the science of energy in its broadest
What you absolutely have to know about
Circular Motion
f
There are 2 types of acceleration:
1. Linear Acceleration
2. Radial Acceleration
Linear Acceleration is:
v
Example
t
Always parallel to the direction you are traveling.
1. If it is in the same direc
What you absolutely have to know about
Forces
Forces:
1. Are a Push or a Pull
2. Are a Vector having a magnitude and direction
kgm
3. Have units of Newtons N ( N = 2 )
s
Newton and his deceptively simple laws:
Newton gives us 3 laws that concern forces of
PHYS 122 Exam 3 Fall 2008
Name
1) A box is moving on a tilted conveyor belt.) Express its change in potential 1) i '2 but TESL X) 9 " l1 A
energy, as it goes from point A to point B a di Ah higher a 3 m ah
A) mgfrB - 1%) B) mgih) 3
C) mg'A - r3) .mg(N-)
2
Phys1220 Exam-2 Fall2015
1. A block with mass M = 2.0 kg is placed on an inclined plane. The plane makes an angle
of 36.87o with the horizontal, and the coefficients of kinetic and static friction between the
block and the plane are k = 0.5 and s = 0.8, r
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6. Anita is running to the right at 10 m/s, as shown in the figure. Balls 1 and 2 are thrown
toward her by friends standing on the ground. According to Anita, both balls are approaching
her at 15 m/s. According to her friends, with what spe
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5.310
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5.37
5.311
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Physics Midterm Review
Unit 1: Origins of Physics
- Aristotle: geocentric universe, observation/logic based reasoning
- Copernicus: heliocentric universe, challenged the status quo
- Johannes Kepler: 3 laws of planetary motion, showed that mathematical de