Answer:
1.909 m
Explanation:
Length of fence = 12 m
r = Radius of circle made by the provided fence
Cirumference of a circle is given by

The circumference of the circle will be equal to the length of the fence



The radius of the fence is 1.909 m
Moons gravity is about 1/6 as powerful as it is on Earth, so about 20 pounds.
Answer:
The answer to your question is: Ke = 3000 Joules
Explanation:
Data
mass = 15 kg
speed = 20 m/s
Kinetic energy = ?
Equation


Ke = 3000 Joules
I'm happy to know that the diagram shows how it's all set up.
If I could see the diagram, then I could probably do a much
better job with an answer. As it is ... 'flying blind' as it were ...
I'm going to wing it and hope it's somewhat helpful.
If the pulley is movable, then I'm picturing one end of the rope
tied to a hook in the ceiling, then the rope passing down through
the pulley, then back up, and you lifting the free end of the rope.
A very useful rule about movable and combination pulleys is:
the force needed to lift the load is
(the weight of the load)
divided by
(the number of strands of rope supporting the load) .
With the setup as I described it, there are 2 strands of rope
supporting the load ... one on each side of the pulley. So the
force needed to lift the load is
(250 N) / 2 = 125 N .
Answer:
f =-20 cm
Explanation:
Given that,
The magnification of a spherical mirror, m = -1
The image distance, v = 40 cm (for negative magnification)
The magnification of a concave mirror is negative. The mirror showing -1 magnification is a concave mirror.
Let f be the focal length of the mirror. We know that,

Object distance, u = -40 cm
Using mirror's formula i.e.

So, the focal length of the mirror is 20 cm.