Answer:
Explanation:
Mary applies a force of 73 N to create an acceleration of
When She increases force to 84 N, it creates an acceleration of
Friction opposes the motion of box
Subtract (i) from (ii)
Therefore friction is
Here, friction is kinetic friction which is given by
Answer:
The value of the magnetic field is
Explanation:
From the question we are told that
The number of turns is
The area of the loop is
The angle is
The torque is
The current is
The torque acting on the current carry loop is mathematically represented as
Where is the magnitude of the magnetic filed
Making B the subject
Substituting values