A steel ball of diameter `d=3.0mm` starts sinking with zero initial velocity in olive oil whose viscosity is `eta=0.90P`. How soon after the beginning of motion will the velocity of the ball differ from the steady-state velocity by `n=1.0%`?

A steel ball of radius 2cm is initially at rest.It is stuck head on by another steel ball of radius 4cm moving with a velocity of 0.72ms^-1.Assuming that the collosion in completely inceelastic.Calculate the velocity of the balls after collision.

A cricket ball of 0.5kg moving with a velocity of 100 m s^(-1) The wavelength associtated with in motion is

A copper ball of diameter d = 1.2cm was placed in an evacuated vessel whose walls are kept at the absolute zero temperature. The initial temperatures of the ball is T_(0) = 300K . Assuming the surface of the ball to be absolutely balck, find how soon its temperature decreases eta = 2.0 times.

A ball of mass M//2 filled with a gas ( whose mass is M//2 ) is kept on a frictionless table . A bullet of mass m = M//4 and velocity v_(0)hat(i) penetrates the ball , and rests inside at t=0. Assume that the amount of gas emitted during the collision can be neglected. The compressed gas is emitted at a contant velocity v_(0)//2 relative to the ball and at an even rate k ( k is a positive constant ) . (a) What is the velocity of the ball after the collision with the bullet ? (b) Find the velocity of the ball v(t) as a function of time. Assume that the emission of gas starts at t=0. What is the final velocity of the ball ?

A ball is projected horizontallu from a top of tower with a velocity of 10 ms^(-1) . Find the velocity of the ball after 0.5 s. Take g= 10 ms^(-2) .

A cricket ball of 0.5 kg is moving with a velocity of 100ms^(-1) . The wavelength associated with its motion is :