To move a boat ahead in water, the boatman has to push the water backwards by his oar. Explain.

Water has

“When a train suddenly moves forward, the passenger standing in the compartment tends to fall backwards". Explain.

Air and tap water are mixtures. Explain.

'Water is essential for life'. Explain.

If a man jumps out from a boat, the boat moves backwards. Why?

Velocity of a boat relative to river current and river current velocity are equal in magnitude. Starting from point A on the southern bank, the boatman wants to reach a point B on the nothern bank in north - east from A . In which direction he has to steer the boat?

In plant water moves from

In Fig. a man stands on a boat floating in still water. The mass of the man and the boat is 60 kg and 120 kg , respectively. a. If the man walks to the front of the boat and stops. what is the separation between the boat and the pier now? b. If the man moves at a constant speed of 3 m//s relative to the boat, what is the total kinetic energy of the system (boat + man)? Compare this energy with the kinetic energy of the system if the boat was tied to the pier.

The current velocity of river grows in proportion to the distance from its bank and reaches the maximum value v_0 in the middle. Near the banks the velocity is zero. A boat is moving along the river in such a manner that the boatman rows his boat always perpendicular to the current. The speed of the boat in still water is u. Find the distance through which the boat crossing the river will be carried away by the current, if the width of the river is c. Also determine the trajectory of the boat.

A satellite, rotating around the earth has water in a jar inside it. A cork is pushed into the water in the jar and then released. The cork will