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.

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.

A bird flies to and fro between two cars wich move with velocities v_(1) and v_(2) , If the speed of the bird is v_(3) and the initial distance ofseparation between then is d , find the total distance covered bythe bird till the cars meet. .

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?

Two racing cars 'A' and 'B' having masses 'M' and '2m' respectively start running from the starting line on a horizontal plane.Both cars 'A' and B' have same speed 'V' which is constant through out the journey. The track of the two cars are the arcs of concentric circle having centres O_(1) and O_(2) as shwon in figure with data. The friction coefficient of the two cars with the road is same. There is a finishing line at the end of the arc. Using these informations solve the following questions. The magnitude of relative acceleration of two cars when car 'A' just reaches the end of circular arc of radius Y .