When you step ashore from a stationary boat, it tends to leave the shore. Explain.

Statement -1 : When a girl jumbs from a boat, the boat slightly moves away from the shore. and Statement-2 : The total linear momentum of an isolated system remain conserved.

Two friends are sitting in a stationary boat. At t = 30s the person at the fromt tosses a sack to the person in the rear, who catches the sack 0.2 s later. Which plot in figure shows the velocity of the boat as a fuction of time ? Positive velocity is forward, negative velocity is backward. Neglet any drag force on the boat from the water :-

A fishing boat is anchored 9 km away from the the nearest point on the shore. A messanger must be sent from the fishing boat to a camp, 15 km from the point on shore closest to boat. If the messanger can walk at a speed of 5 km per hour and can row at 4 km/h. determine the distance of that point (in km) from the shore, where he must land so as to reach the shore in least possible time.

when a source is going away from a stationary observer with the velocity equal to that of sound in air , then the frequency heard by observer is n times the original frequency . The value of n is

When an arrow is shot from a bow, it has kinetic energy in it. Explain briefly from where does it get its kinetic energy.

From a motorboat moving downstream with a velocity 2 m//s with respect to river, a stone is thrown. The stone falls on an ordinary boat at the instant when the motorboat collides with the ordinary boat. The velocity of the ordinary boat with repsect to the river is equal to zero. The river flow velocity is given to be 1 m//s . The initial velocity vector of the stone with respect to earth is :-

When a shot is fired from a gun, the gun gets recoiled. Explain.

When a train approaches a stationary observer, the apparent frequency of the whistle is n' and when the same train recedes away from the observer, the apparent frequency is n'' . Then the apperent frquency n when the observer sitting in the train is :

A motorcycle starts from rest and accelerates along a straight line at 2.2(m)/(s^2) . The speed of sound is 330(m)/(s) . A siren at the starting point remains stationary. When the driver hears the frequency of the siren at 90% of when motorcycle is stationary, the distance travelled by the motorcyclist is

A motorcycle starts from rest and accelerates along a straight line at 2.2(m)/(s^2) . The speed of sound is 330(m)/(s) . A siren at the starting point remains stationary. When the driver hears the frequency of the siren at 90% of when motorcycle is stationary, the distance travelled by the motorcyclist is