Emily is a competitive swimmer. Why does wearing a swim cap help Emily swim faster?
1 answer:
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Answer:
1.6 x N
Explanation:
If the force between two actual wires has this value, the current is defined to be exactly 1 A.
The force between two parallel wires carrying current can be defined as,
F= μ
L/ 2πd
where,
current = 1Amp
current = 2amp
Length 'L'= 1m
distance 'd'= 2.5m
permeability of free space 'μ'= 4πx N/m
Putting the above values in the equation,
F=( 4πx x 1 x 2 x 1 )/ 2πx2.5
F= 1.6 x N
To solve this problem it is necessary to apply the concepts related to the conservation of angular momentum. This can be expressed mathematically as a function of inertia and angular velocity, that is:
Where,
I = Moment of Inertia
= Angular Velocity
For the given object the moment of inertia is equivalent to
Considering that the moment of inertia varies according to distance, and that there are two of these without altering the mass we will finally have to
Our values are given as,
Replacing we have,
Therefore the angular speed after the catch slips is 0.2rad/s