Phys 111
Fall 2008
General Physics: Class Exam I
3 October 2008
Name:
Total:
/50
Instructions
•
There are 7 questions on 6 pages.
•
Show your reasoning and calculations and always justify your answers.
Physical constants and useful formulae
g
= 9
.
81 m/s
G
= 6
.
67
×
10
−
11
N m
2
/kg
2
Question 1
One construction worker standing on the ground throws a brick toward another worker stand
ing above the ground on sca±olding. The worker on the ground throws the brick in such a way
that its speed is exactly 0
.
0 m/s when it reaches the hand of the worker on the sca±olding.
The brick travels vertically and the distance that it travels from the moment that it leaves
the hand of the lower worker until it reaches the hand of the upper worker is exactly 4
.
0 m
.
Determine the speed with which the brick leaves the hand of the lower worker.
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View Full DocumentQuestion 2
A ball is fred into the air at an angle oF 45
◦
.
Which
oF the Following (choose one only) best represents the
velocity and acceleration at the
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 Spring '11
 Phystago
 Math, Force, Friction, Mass, upward slope

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