44. We assume there are no forces or force-components along the
x
direction. We
combine Eq. 22-28 with Newton’s second law, then use Eq. 4-21 to determine time
t
followed by Eq. 4-23 to determine the final velocity (with –
g
replaced by the
a
y
of this
problem); for these purposes, the velocity components
given
in the problem statement are
re-labeled as
v
0
x
and
v
0
y
respectively.
(a) We have
/
( /
)
a
qE
m
e m E
=
= −
G
G
G
which leads to
19
2
13
31
1.60 10
C
N
ˆ
ˆ
120
j
(2.1
10
m
s
) j.
9.11 10
kg
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- Fall '10
- Rebello,NobelS
- Force, Velocity, Orders of magnitude, The Final, final velocity, 0.020 M
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