homework 02 – FONTENOT, BRIAN – Due: Jan 28 2008, 4:00 am
1
Question 1, chap 2, sect 5.
part 1 of 3
10 points
In deep space (no gravity), the bolt (arrow)
of a crossbow accelerates at 129 m
/
s
2
and
attains a speed of 125 m
/
s when it leaves the
bow.
For how long is it accelerated?
Answer in units of s.
Question 2, chap 2, sect 5.
part 2 of 3
10 points
What speed will the bolt have attained 4
.
5 s
after leaving the crossbow?
Answer in units of m
/
s.
Question 3, chap 2, sect 5.
part 3 of 3
10 points
How far will the bolt have traveled during
the 4
.
5 s?
Answer in units of m.
Question 4, chap 2, sect 5.
part 1 of 2
10 points
A speed
boat moving at 30
.
2 m
/
s ap
proaches
a
nowake
buoy
marker
75
.
4
m
ahead. The pilot slows the boat with a con
stant acceleration of

4
.
2 m
/
s
2
by reducing
the throttle.
How long does it take the boat to reach the
buoy?
Answer in units of s.
Question 5, chap 2, sect 5.
part 2 of 2
10 points
What is the velocity of the boat when it
reaches the buoy?
Answer in units of m
/
s.
Question 6, chap 2, sect 6.
part 1 of 1
10 points
A
ball is
thrown
straight up
from
the
ground with an initial velocity of 37
.
2 m
/
s;
at the same instant, a ball is dropped from
the roof of a building 20
.
8 m high.
After how long will the balls be at the same
height?
Answer in units of s.
Question 7, chap 2, sect 5.
part 1 of 1
10 points
A baby sitter pushing a stroller starts from
rest and accelerates uniformly at a rate of
0.705 m/s
2
.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '08
 Turner
 Physics, Acceleration, Gravity, Work, SECT, Fontenot

Click to edit the document details