Version One – Homework 5 – savrasov – 39822 – Oct 31, 2007
1
This
printout
should
have
7
questions.
Multiplechoice questions may continue on
the next column or page – fnd all choices
beFore answering.
The due time is Central
time.
Climbing a Rope
08:01, trigonometry, numeric,
>
1 min, nor
mal.
001
(part 1 oF 1) 2 points
Tim, with mass 60 kg, climbs a gymnasium
rope a distance oF 3
.
5 m.
The acceleration oF gravity is 9
.
8 m
/
s
2
.
How
much
potential
energy
does
Tim
gain?
Correct answer: 2058 J.
Explanation:
Let :
m
= 60 kg
,
h
= 3
.
5 m
,
and
g
= 9
.
8 m
/
s
2
.
Potential energy is
U
=
m g h
= (60 kg) (9
.
8 m
/
s
2
) (3
.
5 m)
=
2058 J
.
keywords:
Lifting a Bowling Ball
08:01, trigonometry, numeric,
>
1 min, nor
mal.
002
(part 1 oF 1) 2 points
A 6
.
4 kg bowling ball is liFted 2
.
1 m into a
storage rack.
The acceleration oF gravity is 9
.
8 m
/
s
2
.
Calculate the increase in the ball’s potential
energy.
Correct answer: 131
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 Fall '09
 RichardScalettar
 Potential Energy, Work

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