It should be 12 N. the force of the book on the table should be the same as the force of the table on the book.
Answer:
Yes such a frame exists: a free-fall (free-float frame) frame. This frame of reference is subject only to gravity and no forces such as electromagnetic forces or nuclear forces.
It is B. Just did the Quiz on Intro to Business
An eclipse i believe is the answer?
Answer:
speed
=
12
m/s
Explanation:
We're asked to find the initial velocity of the box, given it constantly accelerated at
−
3
m/s
2
for
24
m
before coming to a stop.
To do this, we can use the equation
(
v
x
)
2
=
(
v
0
x
)
2
+
2
a
x
(
Δ
x
)
−−−−−−−−−−−−−−−−−−−−−−
where
v
x
is the final velocity of the box (which is
0
since it came to rest)
v
0
x
is the initial velocity of the box (what we're trying to find)
a
x
is the acceleration of the box, given as
−
3
m/s
2
(negative because it's directed opposite to motion; i.e. it is decelerating)
Δ
x
is the distance traveled by the box, given as
24
m
Plugging in knonw values, we have
0
=
(
v
0
x
)
2
+
2
(
−
3
l
m/s
2
)
(
24
l
m
)
v
0
x
=
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
∣
∣
12
l
m/s
∣
∣
−−−−−−−−−−−−
The truck was thus traveling at a speed of
12
m/s
.
