A car moving at a speed of 48km/hr passes by a siren which is surrounding at a frequency of 300Hz. Find out the apparent frequency of siren noted by the driver of the car as the car passes the siren (V=340m/s).

A car is moving with a speed of 30 m/s on a circular path of radius 500m. It's speed is increasing at the rate of 2 m/s^2 . Find acceleration of the car.

Find out the velocity at which a source of frequency 10,000 Hz should approach an observer at rest in order to produce a Doppler shift of 200Hz. (Velocity of sound=340m/s).

An ultrasonic wave of frequency 45000Hz is sent out by sonar shows a frequency rise of 300Hz on reflection. From an approaching submarine. If velocity of sound in water is 1500m/s , calculate the speed of the submarine.

A car moves a distance of 200m. It covers the first half of the distance at a speed of 40km//h and the second half of the distance at speed v. The average speed is 48km//h . Find the value of v.

A car is moving on a circular track of diameter 72m with a speed of 6 m/s.It is accelerated at the rate of root3 m/s2.If the mass of the car is 1000 kg, Find the net force acting on the car.

A bus starts from rest with a constant acceleration of 5m/s^2 . At the same time , a car travelling with a constant velocity of 50m/s overtakes and passes the bus ,find (i)at what distance will the bus overtake the car ? (ii)How fast will the bus overtakes the car after distance S metres.

A motor car weighing 1000 kg moves up an incline rising 1 in 49 at the rate of 54 km/hr. Find the power at which the engine is working .

A car of mass 750 kg has an engine which produces a constant power of 40 kW. If the resistance to motion assumed constant is 800 N, Find the maximum speed at which the car can travel on the road. Also find the acceleration when it is travelling at 25m/s.

A circular track of radius 600m is to be designed for cars moving at an average speed of 180km/hr. what should be the angle of banking of track. Take g = 10 m/sec^2 .