Momentum.

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Presentation transcript:

Momentum

Momentum All objects in motion have momentum. NO MOTION = NO MOMENTUM Momentum – the product of an objects mass and velocity

Formula: Momentum = Mass X Velocity Units for momentum: Kg * m/s Both Mass and Velocity are directly proportional to Momentum. The greater the mass, the greater the momentum. The greater the velocity, the greater the momentum Which has more momentum: 1. A 100 kg football player running at a speed of 2 m/s or a 60 kg football player running at a speed of 3 m/s? Calculate:

Conservation of Momentum Law of conservation of momentum explains what happens will objects collide. Definition: The total momentum of any group of objects remains the same or is conserved unless outside forces act on the objects. Examples of outside forces: friction.

Collision with 2 moving objects – p. 399 Before the crash: Blue car momentum: ______________________ Green car momentum: _______________________ Total momentum of both cars: ______________ After the crash: Blue car momentum: _______________________ Green car momentum: _____________________ Total momentum of both cars: ___________________ During the crash, the back car transfers its momentum to the front car and vise versa. Momentum is conserved.

Collision with one moving object Before the crash: Blue car momentum: ______________________ Green car momentum: _______________________ Total momentum of both cars: ______________ After the crash: Blue car momentum: _______________________ Green car momentum: _____________________ Total momentum of both cars: ___________________ During the crash, the back car transfers its momentum to the front car and vise versa. Momentum is conserved.

Two connected objects Before the crash: After the crash: Blue car momentum: ______________________ Green car momentum: _______________________ Total momentum of both cars: ______________ After the crash: Blue car momentum: _______________________ Green car momentum: _____________________ Total momentum of both cars: ___________________ During the crash, the cars attach, and momentum is still conserved.