Why two boats moving in parallel directions close to each other get attracted?

Assertion : When two boats sails parallel in the same direction and close to each other, they are pulled towards each other. Reason : The viscous drag on a spherical body moving with speed v is proportional to v .

Two persons are moving in the directions opposite to each other. The speeds of the both persons are 5 km/h and 3 km/h, respectively. Find the relative speed of the two persons in respect of each other.

Statement-1 Two parallel wire carrying current in same direction attract each other, whereas two proton beams moving parallel to each other repel each other Statement-2 Wire carrying current is electrically neutral, therefore it is experiencing only magnetic attraction while the electric force of repulsionn between protons is more than the magnetic attraction

Whan air is blown in between two balls suspended close to each other, they are attracted towards each other. Why?

Two proton beams going in the same direction repel each other whereas two wires carrying currents in the same direction attract each other. Explain.

Two protons attract each other when

Two row boats moving parallel to each other and near by, are pulled towards each other. Explain.