A paricle is projected with a velocity of `40ms_-1`. After two seconds, it crosses a vertical pole of height 20.4m. Calculate the angle of projection.

An object is projected upward with a velocity of 100ms^-1 . It will strike the ground in approximately

A particle is projected at an angle of 45^@ with a velocity 9.8ms^-1 . What is horizontal range.

A 14.5 kg mass, fastened to the end of a steel wire of unstretched length 1.0 m, is whirled in a vertical circle with an angular velocity of 2 rev/s at the bottom of the circle. The cross-sectional area of the wire is 0.065 cm^2 . Calculate the elongation of the wire when the mass is at the lowest point of its path.

A particle is projected form ground with an initial velocity 20ms^-1 at an angle 30^@ with the horizontal. What is the magnitude of change of velocity in 5sec.

A body projected with a velocity 25m/s just clears a wall 5m high after 2 seconds. Find the angle of projection and maximum height reached by the body.

A stone is thrown up with a velocity of 20 m/s. Neglecting air resistance calculate the height that the stone will reach

A bullet of mass 10 g is fired from a gun with a velocity of 800ms^-1 .After passing through a mud wall 100cm thick its velocity drops to 100ms^-1 .Calculate the average resistance offered by the wall.

An aeroplane flying horizontally at a height of 1.5 km above the ground is observed at a certain point on the earth to subtend an angle 60°. After 15 second its angle of elevation is observed to be 30°. Calculate the speed of aeroplane in Km/h.

A ball is projected vertically upward with a speed of 50 m/s. Find the time to reach the maximum height,

A stone of 1 kg is thrown with a velocity of 20 ms^-1 across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?