Buttets are fired at regular intervals of 10s from an armoured car A moving with a speed of `10ms^(-1)`towards B. At what interval will an officer seated in car B and dashing with a speed of `20ms^(-1)` towards A hear the report ? Vleocity of sound `=340ms^(-1)` and velocity of wind `=5ms^(-1)` in the direction BA.

Bullets are fires at regulart intervals of 10sec. from an armoured car A moving with a speed of 36km// hour . At what interval with an officer seated in a car B hear the report when the car B is stationary and car A is moving towards car B. Velocity of sound =330 metre // sec. and velocity of wind =10 metres // sec in the direction AB.

bullets are fixed at regualr intervals of 10 second from a car moving with a speed of 30 ms^(-1) towards another car approaching with a speed of 60 m/s . The interval at which the firing can be reported is (Speed of sound = 330 ms^(-1)

A man is driving a car at a speed of 72 kmph towards a hill. He sounds the horn and hears its echo after 2 s. At what distance from the hill the horn was sounded. (Velocity of sound = 340 ms^(-1) )

A car is moving with speed of 2ms^(-1) on a circular path of radius 1 m and its speed is increasing at the rate of 3ms(-1) The net acceleration of the car at this moment in m//s^2 is

A body is projected vertically up with a speed of 20ms^(-1) .The distance travelled by it in "3" seconds it (g=10ms^(-2))

A person walks a distance of "30m" towards east with a speed of 2ms^(-1) and, 40m" towards north with a speed of 3/2ms^(-1) .The average speed and average velocity for his journey is

A car is moving with speed 20 ms ^(-1) on a circular path of radius 100 m. Its speed is increasing at a rate of 3 ms^(-2) . The magnitude of the acceleration of the car at that moment is

A block is moved on a straight line with a speed of 5m^(-1) towards a wall laying 20m away. After collision with wall, block retraces the path with a speed of 4ms^(-1) . What is the average velocity of block during the time interval 0 to 6 sec?

A train is approaching towards a platform with a speed of 10 ms^(-1) , while blowing a whistle of frequency 340 Hz. What is the frequency of whistle heard by a stationary observer on the platform ? (given, speed of sound =340 ms^(-1) )