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Marizza181 [45]
3 years ago
12

Kelly sits on a rock. Her weight is an action force. Describe the reaction force.

Physics
2 answers:
Mumz [18]3 years ago
7 0
An equal and opposite force acting upwards
OverLord2011 [107]3 years ago
5 0
The rock exerts an equal and opposite force on kelly's mass. The rock exerts the same force equal to kelly's mass, to make her sit on the rock, else, the rock would penetrate into the earth along with Kelly!
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Answer:

All the given options will result in an induced emf in the loop.

Explanation:

The induced emf in a conductor is directly proportional to the rate of change of flux.

emf = -\frac{d \phi}{dt} \\\\where;\\\\\phi \ is \ magnetic \ flux\\\\\phi = BA\ cos \theta

where;

A is the area of the loop

B is the strength of the magnetic field

θ is the angle between the loop and the magnetic field

<em>Considering option </em><em>A</em>, moving the loop outside the magnetic field will change the strength of the magnetic field and consequently result in an induced emf.

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