`(1101 ms^-1)/(10.2 ms^-1) = 107.94117647 ~~ 108` .

A stone is dropped into a well of depth 80 m . Splash of sound is heard after 4.25 sec . If g=10ms^(-2) , velocity of sound in air is A) 300 ms^(-1) ; B) 360 ms^(-1) ; C) 320 ms^(-1) ; D) 400 ms^(-1) ;

One of the rectangular components of a velocity of 20 ms^(-1) is 10 ms^(-1) . Find the other component.

One of the rectangular components of a velocity of 20 ms^(-1) is 10 ms^(-1) . Find the other component.

The height and horizontal distances covered by a projectile in a time t are given by y=(4t-5t^(2)) m and x=3t m the velocity of projection is (A) 4ms^(-1) (B) 3ms^(-1) (C) 5ms^(-1) (D) 10ms^(-1)

The speed of a car changes from 0 to 5 ms^(-1) in the first phase and from 5 ms^(-1) to 10 ms^(-1) in the second phase and from 10 ms^(-1) to 15 ms^(-1) during the third phase. In which phase the increase in kinetic energy is more ?

A steamer is moving due east with 36 km/h.To a man in the steamer the wind appears to blow at 18km/h due north.The speed of the wind is (A) 5sqrt(5)ms^(-1) (B) 5ms^(-1) (C) 5sqrt(2)ms^(-1) (D) 10ms^(-1)