The thrust (F) of wind on a sail varies jointly as the area (A) of the sail and the square of the velocity (V) of the wind. The thrust on the sail is 1 unit when the velocity is 16 km/hr. The velocity of the wind when the thrust is 36 unit is :

The force of the wind on a sail varies jointly as the area of the sail and the square of the wind velocity. On a sail of area 50 square yards , the force of a 15-mile-per-hour wind is 45 pounds . Find the force on the sail if the wind increases to 45 miles per hour.

A rocket is ejecting a mass m of gases per unit time with velocity V relative to the rocket, the thrust on the rocket is:

How long will a plane take to fly around a square with side a with the wind blowing at a velocity u, in the two cases (a) the direction of the wind coincides with one of the sides (b) the direction of the wind coincides with one diagonal of the square. The velocity of the plane in still air is v gt u ..

A flage is mounted on a car moving due north with velocity of 20km//hr . Strong winds are blowing due east with velocity of 20km//hr . The flag will point in direction

Fuel is consumed at the rate of 50 kg s^(-1) in a rocket. Find the thrust on the rocket if the velocity of the exhaust gases is 2 km s^(-1) . Also calculate the velocity of the rocket at the instant, when its mass is reduced to l/10th of its initial mass if its initial velocity is zero, (neglect gravity)