A body of mass `m = 1 kg` is thrown at an angle `theta = 45^(@)` to the horizontal with the initial velocity `u = 10 m//s`. Find the mean power delivered by gravity over the whole time of motion of the body.

A body of mass m is thrown at an angle alpha to the horizontal with the initial velocity v_0 . Find the mean power developed by gravity over the wholetime of motion of the body, and the instantaneous power of gravity as a function of time.

A bode mass m is projected at an angle theta with the horizontal with an initial velocity u, the average power of gravitational force over the whole time of flight is.

A small body of mass m is located on a horizontal plane at the point O. The body acquires a horizontal velocity v_0 . Find the mean power developed by the friction force during the whole time of motion, if the frictional coefficient mu=0.27 , m=1.0kg and v_0=1.5ms^-1 .

A body of mass m is thrown upwards at an angle theta with the horizontal with velocity v. While rising up the velocity of the mass after t second will be

A small body of mass m is located on a horizontal plane at the point O. The body of mass m is located on a horizontal plane at the point O. The body acquires a horizontal velocity v_0 . Find, (a) the mean power developed by the friction force during the whole time of motion, if the friction coefficient k=0.27 , m=1.0kg , and v_0=1.5m//s , (b) the maximum instantaneous power developed by the friction force, if the friction coefficient varies as k=alphax , where alpha is a constant, and x is the distance from the point O.

A body of mass m is projected with velocity v at an angle of 45^(@) with the horizontal. Find the change in its momentum at the end of flight.

A ball of mass 'm' is thrown at an angle is 'theta' with the horizontal with an initial velcoity 'u'. The change in its momentum during its flight in a time interval of 't' is .

A particle of mass m is projected at an angle alpha to the horizontal with an initial velocity u . The work done by gravity during the time it reaches its highest point is