The slopes of wind screen of two cars are `alpha_1=30^@ and alpha_2= 15^@` respectively. At what ratio `v_1/ v_2` of the velocities of the cars will their drivers see the hail stones bounced back by the wind screen on their cars in vertical direction? Assume hail stones fall vertically downwards and collisions to be elastic.

The slope of wind screen of two cars are alpha_(1)=30^(@) and a_(2)=15^(@) respecively. At what ratio of (v_(1))/(v_(2)) of the velocities of the cars will their drivers see the hall stones bounced back by the wind screen on their cars in vertical direction assume hall stones fall vertically downwards and collisions to be elastic?

The slopes of the windscreen of two motorcars are beta_(1) = 30^(@) and beta_(2) = 15^(@) respectively. At what ratio v_(1)//v_(2) of the velocities of the cars will their drivers see the hailstones bounced by the windscreen of their cars in the vertical direction ? Assume that haistones fall vertically.

The front wind screen of a car is inclined at an 60^@ with the vertical. Hailstones fall vertically downwards with a speed of 5 sqrt(3) ms^-1 . Find the speed of the car so that hailstones are bounced back by the screen in vertically upward direction with respect to car. Assume elastic collision of hailstones with wind screen.

Hailstones falling vertically with speed of 10 m/s hit with respect to himself the windscreen of a moving car and rebound elastically. Find the velocity of the car if the driver find the haolstones rebound vertically after striking. Windscreen makes an angle 30^(@) with the horizontal.

Hailstones falling vertically with speed of 10 m/s hit with respect to himself the windscreen of a moving car and rebound elastically. Find the velocity of the car if the driver find the haolstones rebound vertically after striking. Windscreen makes an angle 30^(@) with the horizontal.

Hailstones falling vertically with speed of 10 m/s hit with respect to himself the windscreen of a moving car and rebound elastically. Find the velocity of the car if the driver find the hailstones rebound vertically after striking. Windscreen makes an angle 30^(@) with the horizontal.

A glass wind screen whose inclination with the vertical can be changed is mounted on a car. The moves horizontally with a speed of 2m//s . At what angle alpha with the vertical should the wind screen placed so that the rain drops falling vertically downwards with velcoity 6m//s strike the wind screen perpendicularly?