Chapter 7 Impulse and Momentum Chapter 7 Impulse

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Chapter 7 Impulse and Momentum

Chapter 7 Impulse and Momentum

Chapter 7 Impulse and Momentum Concepts learned so far: • Impulse • Momentum •

Chapter 7 Impulse and Momentum Concepts learned so far: • Impulse • Momentum • Impulse-Momentum theorem • Conservation of momentum

Collisions in Two Dimensions

Collisions in Two Dimensions

Collisions in Two Dimensions

Collisions in Two Dimensions

Collisions in Two Dimensions 1. Apply conservation of momentum in the X direction.

Collisions in Two Dimensions 1. Apply conservation of momentum in the X direction.

Collisions in Two Dimensions 1. Apply conservation of momentum in the X direction. 2.

Collisions in Two Dimensions 1. Apply conservation of momentum in the X direction. 2. Apply the conservation of momentum in the Y direction.

Collisions in Two Dimensions 1. Apply conservation of momentum in the X direction. 2.

Collisions in Two Dimensions 1. Apply conservation of momentum in the X direction. 2. Apply the conservation of momentum in the Y direction. 3. If the collision is elastic, apply the conservation of energy.

Problem 35 A 50. 0 -kg skater is traveling due east at a speed

Problem 35 A 50. 0 -kg skater is traveling due east at a speed of 3. 00 m/s. A 70. 0 -kg skater is moving due south at a speed of 7. 00 m/s. They collide and hold on to each other after the collision, managing to move off at an angle θ south of east, with a speed of vf. Find (a) the angle θ and (b) the speed vf, assuming that friction can be ignored.

7. 5 Center of Mass The concept center of mass (abbreviated as “cm”) is

7. 5 Center of Mass The concept center of mass (abbreviated as “cm”) is very useful in dealing with larger objects. For example, in dealing with Earth, we placed the mass of Earth at the cm of the Earth

Definition of CM The center of mass is a point that represents the average

Definition of CM The center of mass is a point that represents the average location for the total mass of a system.

Center of Mass Where is the cm of the following two 5 -kg masses?

Center of Mass Where is the cm of the following two 5 -kg masses?

Center of Mass Where is the cm of the following two 5 -kg masses?

Center of Mass Where is the cm of the following two 5 -kg masses? Answer: In the middle.

Center of Mass Where is the cm of the following two, 5 -kg &

Center of Mass Where is the cm of the following two, 5 -kg & 12 -kg masses?

Center of Mass Where is the cm of the following two, 5 -kg &

Center of Mass Where is the cm of the following two, 5 -kg & 12 -kg masses? Answer: The center of mass “cm” of the two masses is located on a line between them and lies closer to the more massive 12 -kg mass.

Center of Mass

Center of Mass

CM of point masses

CM of point masses

Velocity of the CM of point masses

Velocity of the CM of point masses