EES 0836 Lecture Notes - Lecture 20: Net Force, Centripetal Force
3 Apr 2016
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Lecture -20: velocity and acceleration, velocity is a speed and associated direction. 50 m/s straight upward: acceleration is any change in velocity. Either in speed or direction: acceleration measured as rate of change of velocity. Velocity is expressed in meters per second (m/s) Acceleration is meters per second per second. Expressed as m/s2 (meters per second-squared: the force-acceleration connection, whenever there is a net force, there will be an acceleration. A ball thrown into the air has the force of gravity operating on it, so its velocity continuously changes, resulting in a curved path. When you step on the gas, a forward force acts on your car, making it speed up. The force of gravity attracts the earth toward the sun. This has the effect of changing the direction of earth"s velocity, wrapping it into a circle around the sun (centripetal force)
