Ch 03: 2D Motion (Projectile Motion)See all chapters
All Chapters
Ch 01: Units & Vectors
Ch 02: 1D Motion (Kinematics)
Ch 03: 2D Motion (Projectile Motion)
Ch 04: Intro to Forces (Dynamics)
Ch 05: Friction, Inclines, Systems
Ch 06: Centripetal Forces & Gravitation
Ch 07: Work & Energy
Ch 08: Conservation of Energy
Ch 09: Momentum & Impulse
Ch 10: Rotational Kinematics
Ch 11: Rotational Inertia & Energy
Ch 12: Torque & Rotational Dynamics
Ch 13: Rotational Equilibrium
Ch 14: Angular Momentum
Ch 15: Periodic Motion (NEW)
Ch 15: Periodic Motion (Oscillations)
Ch 16: Waves & Sound
Ch 17: Fluid Mechanics
Ch 18: Heat and Temperature
Ch 19: Kinetic Theory of Ideal Gasses
Ch 20: The First Law of Thermodynamics
Ch 21: The Second Law of Thermodynamics
Ch 22: Electric Force & Field; Gauss' Law
Ch 23: Electric Potential
Ch 24: Capacitors & Dielectrics
Ch 25: Resistors & DC Circuits
Ch 26: Magnetic Fields and Forces
Ch 27: Sources of Magnetic Field
Ch 28: Induction and Inductance
Ch 29: Alternating Current
Ch 30: Electromagnetic Waves
Ch 31: Geometric Optics
Ch 32: Wave Optics
Ch 34: Special Relativity
Ch 35: Particle-Wave Duality
Ch 36: Atomic Structure
Ch 37: Nuclear Physics
Ch 38: Quantum Mechanics

Initial Velocity in Projectile Motion

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Sections
Intro to 2D Motion
Projectile Motion
More Projectile Motion
Initial Velocity in Projectile Motion
Circular Motion

Concept #1: Finding Initial Velocity in Projectile Motion

Practice: The range of an object launched from the ground at an angle is 300 m. If the vertical component of its velocity just before returning to the ground has magnitude 50 m/s, find the magnitude and direction of its initial velocity.

Practice: An object is launched from the ground with an initial 40 m/s at an unknown angle. It reaches its maximum height in 3.5 seconds, before returning to the ground. Find its initial launch angle.

Practice: An object is launched from the ground with an unknown initial speed directed at 30° above the horizontal. If it reaches a maximum height of 40 m before returning to the ground, find its initial speed.