A skater can spin faster by pulling her arms closer to her body or spin slower by spreading her arms out from her body due to conservation of angular momentum.
What is conservation of angular momentum?
- Conservation of angular momentum is a physical property of a spinning system such that its spin remains constant unless it is acted upon by an external force, or to put in another way, the speed of rotation is constant as long as net torque is zero.
- Angular momentum, sometimes also referred to as spin, is determined by an object's mass, its velocity and distance of an object's mass from the point of rotation.
- The nearer the mass is to its axis point or the more consolidated it is around that axis the greater its velocity.
Learn more about the conservation of angular momentum with the help of the given link:
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Answer: Plot each graph on the same coordinate system.
35 (
m/
s)
50
m
a
v
t.
Answer:
H=(0,0,2.39)A/m
Explanation:
Ampere's Law for a current filament:
H*(2*pi*R)=I ⇒ H=I/(2*pi*R)
in this case R=y=1; because the current is in the axis x
H=I/(2*pi)=15/(2*pi) A/m=2.39A/m; magnitude
the vector:
to find the direction of the magnetic force H, we uses the right hand rule
H=(0,0,2.39)A/m
Answer:
Explanation:
As we know that pressure between the cylinder and plunger is increased by 1.59 times
So this will make a net force upwards on the cylinder which is given as
now we will have
Here initial pressure is given as
now new pressure is given as
so we have force on the cylinder given as
now the acceleration is given as
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