It's a projectile near the earth under the influence of gravity only.
Explanation:
Given :
Initial angular velocity =w_i= 215 rev/min
Final angular velocity =w_f= 0
Number of revolutions=n =75.0 rev
Using relation
Converting to rad/s^2
The work that is done when twice the load is lifted twice the distance is
four times as much
The net work performed by forces acting on an object equals the change in kinetic energy, according to the work-energy theorem.
when an item slows down, the net work applied to it decreases, its change in kinetic energy is negative, and its ultimate kinetic energy is less than its starting kinetic energy. When an item accelerates, positive net work is done on it. All the forces acting on an item must be taken into consideration when determining the net work. You will obtain an incorrect result if you exclude any forces that affect an item or if you add any forces that do not affect it.
Hence The work that is done when twice the load is lifted twice the distance is four times as much
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The force between two parallel wires carrying currents in the same direction is attractive. It is repulsive if the currents are in opposite directions.
