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Formulas/physics/Kinematics

Kinematics

Uniform Motion
→ Derivation
Position of a body moving at constant velocity.
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First Equation of Motion
→ Derivation
Final velocity in terms of initial velocity, uniform acceleration, and time.
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Second Equation of Motion
→ Derivation
Displacement in terms of initial velocity, acceleration, and time.
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Average Velocity
→ Derivation
Displacement per unit time over a finite interval.
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Third Equation of Motion
→ Derivation
Relates final velocity to initial velocity, acceleration, and displacement.
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Average Acceleration
→ Derivation
Change in velocity per unit time over a finite interval.
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Instantaneous Velocity
→ Derivation
Velocity at a specific instant — the derivative of position with respect to time.
Class 11Class JEE
Time of Flight
→ Derivation
Total time a projectile remains in the air when launched from and landing on level ground.
Class 11Class JEE
Maximum Height of a Projectile
→ Derivation
Greatest vertical height reached by a projectile launched from level ground.
Class 11Class JEE
Instantaneous Acceleration
→ Derivation
Acceleration at a specific instant — the derivative of velocity with respect to time.
Class 11Class JEE
Range of a Projectile
→ Derivation
Horizontal range on level ground. Maximum range at θ = 45°.
Class 11Class JEE
Relative Velocity
→ Derivation
Velocity of A as observed from B.
Class 11Class JEE
Velocity Components of a Projectile
→ Derivation
Horizontal and vertical velocity components at any time t.
Class 11Class JEE
Speed of Projectile at Any Time
→ Derivation
Magnitude of velocity vector at any instant during projectile motion.
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Angle of Velocity at Any Time
→ Derivation
Direction of velocity vector with respect to horizontal at any instant.
Class 11Class JEE
Position of Projectile at Any Time
→ Derivation
Horizontal and vertical coordinates of a projectile at time t.
Class 11Class JEE
Equation of Trajectory
→ Derivation
Path of a projectile — a downward-opening parabola.
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Horizontal Projection — Time of Flight
→ Derivation
Time for a horizontally projected body to fall height h.
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Horizontal Projection — Range
→ Derivation
Horizontal distance covered by a body projected horizontally from height h.
Class 11Class JEE
Horizontal Projection — Velocity at Any Time
→ Derivation
Speed of a horizontally projected body at time t.
Class 11Class JEE
Horizontal Projection — Trajectory
→ Derivation
Parabolic path of a horizontally projected body.
Class 11Class JEE
Projection at Angle from Height — Time of Flight
→ Derivation
Time of flight when projected at angle θ from height h above ground.
Class 11Class JEE
Projection at Angle from Height — Range
→ Derivation
Horizontal range when projected at angle θ from height h.
Class 11Class JEE
Projection at Angle from Height — Trajectory
→ Derivation
Equation of path when projected at angle θ from height h.
Class 11Class JEE
Projectile on Inclined Plane — Range Up the Plane
→ Derivation
Range 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
→ Derivation
Range along an inclined plane when projected down the slope.
Class JEE
Projectile on Inclined Plane — Maximum Range
→ Derivation
Maximum range achievable on an inclined plane of angle β.
Class JEE
Projectile from a Moving Body
→ Derivation
Velocity of a projectile launched from a moving body — vector addition of body velocity and launch velocity.
Class 11Class JEE
Effect of Air Resistance on Projectile
→ Derivation
Air resistance reduces range, maximum height, and time of flight. Optimal angle shifts below 45°.
Class JEE
Average Speed
Gives the average speed of an object as total distance traveled divided by total time taken.
Magnitude of Resultant Vector
Gives the magnitude of the resultant of two vectors inclined at an angle theta to each other.
Magnitude of Vector Difference
Gives the magnitude of the subtraction vector of two vectors inclined at an angle theta.
Scalar Product of Two Vectors
Gives the dot product of two vectors in terms of their magnitudes and included angle or rectangular components.
Scalar Projection of a Vector
Gives the magnitude of the projection of vector A along the direction of vector B.
Centripetal Acceleration
Gives the radial acceleration directed toward the centre for an object moving in a circle of radius R with speed v.