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A bomber flying upward at an angle of 53° with the vertical releases a bomb at an altitude of 800 m  The bomb strikes the ground 20 sec after its release. The velocity of the bomber at the time of the release of the bomb is v m s-1  . Find v4.

[Given sin53°=0.8; g=10 m s-2 ] 

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Important Questions on Kinematics

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A man is travelling on a flat car which is moving up a plane inclined at cosθ=45 to the horizontal with a speed 5 m s-1. He throws a ball towards a stationary hoop located perpendicular to the incline in such a way that the ball moves parallel to the slope of the incline while going through the centre of the hoop. The centre of the hoop is 4 m  high from the man's hand calculate the time taken (in s) by the ball to reach the hoop in second. 

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A stone is projected horizontally with speed V from a height h above ground. A horizontal wind is blowing in a direction opposite to the velocity of projection and gives the stone a constant horizontal acceleration f (in a direction opposite to the initial velocity). As a result, the stone falls on the ground at a point vertically below the point of projection. Then find the value of f2hgV2.

(g is acceleration due to gravity)

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IMPORTANT
If at an instant the velocity of a projectile be 60 m s-1 and its inclination to the horizontal be 30°, at what time interval (in s) after that instant will the particle be moving at right angles to its former direction. g=10 m s-2
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A projectile is projected at an angle α>45° with an initial velocity u. The time t at which its horizontal component will equal the vertical component in magnitude:
MEDIUM
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IMPORTANT
At what angle should a body be projected with a velocity 24 m s-1 just to pass over the obstacle 14 m high at a distance of 24 m. [Take g=10 m s-2
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JEE Main/Advance
IMPORTANT

Two stones are projected from the level ground. Trajectories of two stones are shown in the figure. Both stones have same maximum heights above level ground as shown. Let T1 and T2 be their time of flights and u1 and u2 be their speeds of projection respectively (neglect air resistance). Then

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JEE Main/Advance
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A projectile of mass 1 kg is projected with a velocity of 20 m s-1 such that it strikes on the same level as the point of projection at a distance of 3 m. Which of the following options is correct?
EASY
JEE Main/Advance
IMPORTANT
Velocity (along vertical direction) of the particle at point P is:
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