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8.1 Linear Momentum and Force
The average effective force is determined using graphical representation.
Average force and impulse are calculated.
The principle of momentum is related to atomic and subatomic particles.
Determine the final velocities in an elastic collision.
Reckless energy and loss are determined by the mass and initial velocity.
Discuss two-dimensional collision as an extension of one-dimensional analysis.
Determine the magnitude and direction of the final velocity.
Explain the principle behind jet engines.
Discuss the factors that affect the rocket's speed.
Most of the ways we use the term momentum are consistent with its scientific definition.
Sports teams or politicians are gaining and losing.
We know that there is something to do with collisions.
The rugby players in the picture colliding and falling to the ground are expected to have great effects in the resulting collision.
A tendency to move in the same direction is associated with great mass and speed.
It is important because it is conserved.
In our study of momentum, we will see that only a few physical quantities are conserved in nature, and that studying them yields fundamental insight into how nature works.
The object's mass and speed are directly proportional to the object's momentum.
The direction of the momentum is the same as the velocity.
The SI unit is for momentum.
We can only calculate the magnitude of the momentum because no direction is given.
Only magnitudes are considered.
Substitute the known values for the player's mass and speed into the equation to determine the player's momentum.
Substitute the known values for the ball's mass and speed into the equation to determine the ball's momentum.
The player has more mass than the ball.
The player's momentum is much greater than the football's.
The player's motion is not affected if he catches the ball.
We will quantify what happens in the later sections.
Early in the development of classical physics, the importance of momentum was recognized.
The law uses symbols to show where the net external force is, the change in momentum, and the change in time.
The net external force is the change in momentum of a system.
Both force and momentum are related.
Newton's second law of motion, which states that force acting over time can change momentum, can be stated in its most broadly applicable form.
The study of atomic and subatomic particles in quantum mechanics uses the concept of momentum.
A special case is included in the second law of motion.
As follows, we can derive this form.
The mass of the system is constant.
The second law of motion can be applied to systems where the mass is changing, such as rockets, and to systems of constant mass.
Venus Williams hit the fastest serve in a premier women's match, reaching a speed of 58 m/s.
The problem is only one dimensions because the ball has no horizontal component before impact.
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