Power
is calculated by dividing the work done with the time interval of the motion.
Work, on the other hand, is force times the distance traveled. Therefore, we
can calculate as follows:<span>
Power=W/t = mgd/t
90 = 60(9.81)d / 40
d = 6.12 m
Number of steps = 20/6.12 = 3.27 or 3 steps</span>
Answer:
The object is moving away from the origin
The object started at 2 meters
The object is traveling at a constant velocity
Explanation:
<span>Within the visible spectrum, our experience of red is associated with
the longest wavelengths visible to our eyes.
Our experience of violet is associated with the shortest wavelengths
visible to our eyes.
And all the other colors are associated with the wavelengths that are
intermediate between those two extremes.</span>
During the resting phase, −80 mV is the electric potential energy of a typical Na ion outside of the cell
<h3>
What do you understand by electric potential energy ?</h3>
The power required to move a charge in opposition to an electric field is known as electric potential energy. A charge must be moved through a stronger electric field with more energy, but it also must be moved through a weaker electric field with more energy.
You cannot see the charge that is waiting to pass through the wires when a light switch is off. That is but one illustration of electric potential energy. Other instances include: a switched-off incandescent light bulb.
To learn more about the electric potential energy, visit: brainly.com/question/24043857
#SPJ4
All credit goes to the person who answered this years ago:)
Reaches max height at t = 2.42s.
Explanation:
I've assumed we are neglecting air resistance. If not let me know and I'll update.
We want to examine the behaviour of the ball in the y-direction. In the absence of air resistance the only force acting on the ball is gravity, which produces an acceleration in the negative y direction. From Newton's 2nd law:
m
d
2
y
d
t
2
=
−
m
g
m
d
2
y
d
t
2
=
−
m
g
Integrating:
d
y
d
t
=
−
∫
g
d
t
d
y
d
t
=
−
g
⋅
t
+
C
From initial conditions,
d
y
d
t
=
v
y
(
t
)
,
v
0
=
v
(
0
)
=
31
⋅
sin
(
50
)
∴
v
y
(
t
)
=
v
0
−
g
⋅
t
The maximum height will be reached at
v
y
=
0
so we solve for t.
v
y
(
t
h
max
)
=
0
⇒
v
0
=
g
⋅
t
h
max
t
h
max
=
v
0
g
=
31
⋅
sin
(
50
)