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Sign Selection of Kinematics Variables
How do we know which signs to choose for the velocity and acceleration in any kinematics equation? Is there only one correct set of signs for every problem?Going Up and Coming Down
An object thrown upward with velocity v0 will slow down until it reaches the peak of its trajectory, where it reverses its motion. The trip down is the reverse image of the trip up: At the same height, the velocity on each leg of the trip is the same, only its direction is reversed.Orthogonal Vectors
Given a vector V whose components are (Vx ,Vy) - what will be the components of the vector rotated by 90° counter clockwise?Projectile Motion
A projectile is shot at an initial velocity v0 at an angle q above the horizon. How far will it go? How high will it rise? What is the shape of its trajectory?Circular Motion
An object is moving in a circle. What are the vector expressions for its velocity and acceleration?Bungee Jumping: The Forces
What are the forces acting on a bungee jumper? And what determines how far the jumper will fall before bottoming out?Bungee Jumping: The Energy
Aided by energy considerations we can finally bring to conclusion the bungee-jump analysis and find the endpoint of the jumper's trip.