PLEASE HELP NOW REALLY IMPORTANT! explain in terms of reference, if you’re inside a moving train everything on the outside can s
1 answer:
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Answer:
0.25 m
Explanation:
We can solve the problem by using the lens equation:
where
f is the focal length
p is the distance of the object from the lens
q is the distance of the image from the lens
In this problem, we have
f = +20 cm=+0.20 m (the focal length is positive for a converging lens)
q = +1.0 m (the image distance is positive for a real image)
Solving the equation for p, we find
Explanation:
The given data is as follows.
k = 130 N/m, = 17 cm = 0.17 m (as 1 m = 100 cm)
mass (m) = 2.8 kg
When the spring is compressed then energy stored in it is as follows.
Energy =
Now, spring energy gets converted into kinetic energy when the box is launched.
So, =
=
= 1.34
v = 1.15 m/sec
Now,
Frictional force =
=
= 4.116 N
Also, Kinetic energy = work done by friction
1.8515 =
d = 0.449 m
Thus, we can conclude that the box slides 0.449 m across the rough surface before stopping.