Kinematics
First Equation of Motion
→ DerivationFinal velocity in terms of initial velocity, uniform acceleration, and time.
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Uniform Motion
→ DerivationPosition of a body moving at constant velocity.
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Average Velocity
→ DerivationDisplacement per unit time over a finite interval.
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Second Equation of Motion
→ DerivationDisplacement in terms of initial velocity, acceleration, and time.
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Average Acceleration
→ DerivationChange in velocity per unit time over a finite interval.
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Third Equation of Motion
→ DerivationRelates final velocity to initial velocity, acceleration, and displacement.
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Time of Flight
→ DerivationTotal time a projectile remains in the air when launched from and landing on level ground.
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Instantaneous Velocity
→ DerivationVelocity at a specific instant — the derivative of position with respect to time.
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Instantaneous Acceleration
→ DerivationAcceleration at a specific instant — the derivative of velocity with respect to time.
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Maximum Height of a Projectile
→ DerivationGreatest vertical height reached by a projectile launched from level ground.
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Range of a Projectile
→ DerivationHorizontal range on level ground. Maximum range at θ = 45°.
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Velocity Components of a Projectile
→ DerivationHorizontal and vertical velocity components at any time t.
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Speed of Projectile at Any Time
→ DerivationMagnitude of velocity vector at any instant during projectile motion.
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Angle of Velocity at Any Time
→ DerivationDirection of velocity vector with respect to horizontal at any instant.
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Position of Projectile at Any Time
→ DerivationHorizontal and vertical coordinates of a projectile at time t.
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Equation of Trajectory
→ DerivationPath of a projectile — a downward-opening parabola.
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Horizontal Projection — Time of Flight
→ DerivationTime for a horizontally projected body to fall height h.
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Horizontal Projection — Range
→ DerivationHorizontal distance covered by a body projected horizontally from height h.
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Horizontal Projection — Velocity at Any Time
→ DerivationSpeed of a horizontally projected body at time t.
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Horizontal Projection — Trajectory
→ DerivationParabolic path of a horizontally projected body.
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Projection at Angle from Height — Time of Flight
→ DerivationTime of flight when projected at angle θ from height h above ground.
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Projection at Angle from Height — Range
→ DerivationHorizontal range when projected at angle θ from height h.
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Projection at Angle from Height — Trajectory
→ DerivationEquation of path when projected at angle θ from height h.
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Projectile on Inclined Plane — Range Up the Plane
→ DerivationRange along an inclined plane when projected up the slope. α = projection angle from horizontal, β = inclination angle.
Class JEE
Projectile on Inclined Plane — Range Down the Plane
→ DerivationRange along an inclined plane when projected down the slope.
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Projectile on Inclined Plane — Maximum Range
→ DerivationMaximum range achievable on an inclined plane of angle β.
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Projectile from a Moving Body
→ DerivationVelocity of a projectile launched from a moving body — vector addition of body velocity and launch velocity.
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Effect of Air Resistance on Projectile
→ DerivationAir resistance reduces range, maximum height, and time of flight. Optimal angle shifts below 45°.
Class JEE