The driver of a car moving towards a rocket launching pad with a speed of 6 m `s^(-1)` observed that the rocket is moving with speed of 10 m `s^(-1)`. The upward speed of the rocket as seen by the stationery observer is nearly

Consider the vehicle emitting sound wave of frequency 700 Hz moving towards an observer at a speed 22 m s^(-1) . Assuming the observer to be at rest, and speed of sound to be 330 m s^(-1) , the frequency of sound as measured by the observer is

The force on a rocket moving with a veloctiy 300 m/s is 210N. The rate of consumption of fuel of rocket is

An observer moves towards a plane mirror with a speed of 2(m)/(sec) . The speed of the image with respect to the observer is

A car is moving towards south with a speed of 20 m s^(-1) . A motorcycst is moving towards east with a speed of 15 m s^(-1) . At a crttain instant, the motorcyclistis due south of the car and is at a distance of 50 m from the car. The shortest distance between the motorcyclist and the car is.

A car is moving towards east with a speed of 25 km h^-1 . To the driver of the car, a bus appears to move towards north with a speed of 25 sqrt(3) km h^-1 . What is the actual velocity of the bus ?

A car is moving towards south with a speed of 20 m s^(-1) . A motorcycst is moving towards east with a speed of 15 s^(-1) . At a certtain instant, the motorcyclistis due south of the car and is at a distance of 50 m from the car. The time after which they are closest to each other.

A rocket is moving in a gravity free space with a constant acceleration of 2ms^(-1) along +x direction (see Fig.5.126). The length of a chamber inside the rocket is 4m. A ball is thrown from the left end of the chamber in +x direction with a speed of 0.3 ms^(-1) relative to the rocket. At the same time , another ball is thrown in -x direction with a speed of 0.2ms^(-1) from its right and relative to the rocket. the time in seconds when the two balls hit each other is:

A train is moving towards East with a speed 20 m/s. A person is running on the roof of the train with a speed 3 m/s against the motion of train. Velocity of the person as seen by an observer on ground will be :