Motion on an inclined plane Find velocity from acceleration Introduction to Force and motion.

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Presentation transcript:

Motion on an inclined plane Find velocity from acceleration Introduction to Force and motion

Inclined plane

Estimate the angle of slope or a run.

Finding velocity from acceleration The change of velocity is positive if the area above a=0 axis ; and is negative if the area is below. Q1: What is the velocity at t=10s? At t=0, v=-10m/s. 1)16 m/s; 2)22m/s; 3)12m/s; 4)26 m/s.

Forces and motion

F = ma Newton’ second Law

Q1: A rubber band stretched to the standard length causes an object to accelerate at 1 m/s^2. Another object with twice the same is pulled by five rubber band stretched to the same length. The acceleration is 1)0.5 m/s^2; 2)1m/s^2; 3)2.5m/s^2; 4)5m/s^2.

Inertial reference frame Only in an inertial reference frame, Newton’s laws are valid.