Linear Momentum and Force

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Presentation transcript:

Linear Momentum and Force Marcelo Mendonca and Teppei Yoshikawa

Momentum -The quantity of motion of a moving body and it implies a tendency to continue its course -p=mv -SI unit for p is kg x m/s

Newton’s Second Law of Motion The net external force equals the change in momentum of a system divided by the time in which it changes Fnet=ma → Fnet=mv/t → Fnet=p/t → Fnet x t = p (only if mass is constant)

Forces in opposite directions Fnet = 0

An object that has a small mass and an object that has a large mass have the same momentum. Which object has the largest kinetic energy?

2. An object that has a small mass and an object that has a large mass have the same kinetic energy. Which mass has the largest momentum?

5) A runaway train car that has a mass of 15,000 kg travels at a speed of 5.4 m/s down a track. Compute the time required for a force of 1500 N to bring the car to rest.

6.The mass of Earth is 5.972x10^24 kg and its orbital radius is an average of 1.496x10^11 m. Calculate its linear momentum.

Lab https://phet.colorado.edu/en/simulation/forces-and-motion-basics