An observer A is at rest in gournd frame, observer B is moving with constant another observer C is moving with constant velocity of 1m/s.

A source of sound, producing a sinusoidal wave, is moving uniformly towards an observer at a velocity of 20 m/s. The observer is moving away from the source at a constant velocity of 10 m / s. Frequency of the source is 200 Hz and speed of sound in air is of 340 m/s. (a) How many times, in an interval of 10 second, the eardrums of the observer will sense maximum change in pressure? (b) What will be apparent wavelength of sound for the observer?

A block of mass m_1 moves with an acceleration a_(12) relative to a trolley as shown in figure. The block is being observed by two observers (2) and (3). The observer (2) is at rest with respect to trolley which is moving with acceleration a_2 while the observer(3) is moving on ground with acceleration a_3 . What is the work done by the pseudo force as observed by the observers (2) and (3) on the block during time t? Assume zero intial velocities of the bodies and observers.

A block of mass m_1 moves with an acceleration a_(12) relative to a trolley as shown in figure. The block is being observed by two observers (2) and (3). The observer (2) is at rest with respect to trolley which is moving with acceleration a_2 while the observer(3) is moving on ground with acceleration a_3 . What is the work done by the pseudo force as observed by the observers (2) and (3) on the block during time t? Assume zero intial velocities of the bodies and observers.

Observer A is at rest. Source S_(1) is moving towards observer A and source S_(2) is moving away from observer A. velocity of sound is 330(m)/(sec) . beta = beat frequency heard per second by A. Approximate value of beta is:

Observer A is at rest. Source S_(1) is moving towards observer A and source S_(2) is moving away from observer A. velocity of sound is 330(m)/(sec) . beta = beat frequency heard per second by A. Approximate value of beta is:

A frame will be inertial, if it moves with respect to another inertial frame with a constant :-

A frame will be inertial, if it moves with respect to another inertial frame with a constant :-

A frame will be inertial, if it moves with respect to another inertial frame with a constant :-

A particle moves perpendicular towards a plane mirror with a constant speed of 4 cm//s .What is the speed of the image observed by an observed moving with 2 cm//s along the same direction? Mirror is also moving with a speed of 10cm//s in the opposite direction. (All speeds are with respect to ground frame of refrence)

A particle moves perpendicular towards a plane mirror with a constant speed of 4 cm//s .What is the speed of the image observed by an observed moving with 2 cm//s along the same direction? Mirror is also moving with a speed of 10cm//s in the opposite direction. (All speeds are with respect to ground frame of refrence)