11. A boy wants to throw a ball from a point A so as to just clear the obstruction at B. The minimum horizontal velocity with which the boy should throw the ball is (A) `23.5 ms^(-1)` (B) `47 ms^(-1)` (C) `235 ms^(-1)` (D) `32.5 ms^(-1)`

A cricketer can throw a ball to maximum horizontal distance of 160 m. Calculate the maximum vertical height to which he can throw the ball. Given g=10ms^(-2) .

An aeroplane is moving horizontally at 30ms^(-1) at a height of 1km towards a target on the ground which is intended to be bombed The velocity with which bomb hits the target is (A) 100ms^(-1) (B) 200ms^(-1) (C) 144.6ms^(-1) (D) 150ms^(-1)

A body is projected horizontally from the top of the tower.It strikes the ground at an angle of 45^(0) after 5 Sec. The velocity of projection is (A) 19.6ms^(-1) (B) 39.2ms^(-1) (C) 49.0ms^(-1) (D) 29.4ms^(-1)

A man is standing on a rail road car travelling with a constant speed of v = 10 ms^-1 (Fig . 5.34). He wishes to throw a ball through a stationary hoop 5 m above the height of his hands in such a manner that the ball will move horizontally as it passes through the hoop. He throws the ball with a speed of 12.5 ms^-1 w.r.t. himself. (a) What must be the vertical component of the initial velocity of the ball ? (b) How many seconds after he releases the ball will it pass through the hoop ? ( c) At what horizontal distance in front of the loop must he release the ball ? .

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)

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)

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) ;

A stone is thrown horizontally with velocity g ms^(-1) from the top of a tower of height g metre. The velocity with which it hits the ground is ("in" ms^(-1))

A player throws a ball upwards with an initial speed of 29.4 ms^(-1). What are the velcity and acceleration of the hall at the highest point os its motion ?

At what angle should a body be projected with a velocity 24 ms^(-1) . Just to pass over the obstacle 16 m high at a horizontal distance of 32 m ? Take g = 10 ms^(-2) .