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Physics Essential Standards Covered:
Physics Essential Standards Covered:
Phy.1.3.2
Define momentum as a vector quantity proportional to the product of mass and velocity, p=mv
distinguish momentum from inertia and velocity; develop a conceptual understanding that the same momentum could be associated with a slow-moving massive object and an object moving at high velocity with a very small mass (e.g. - 100 kg object moving 1 m/s has the same momentum as a 1-kg object moving 100m/s).
Conceptually and mathematically analyze Newton’s second law to relate the change in momentum, p=m v , to acceleration in order to develop the impulse-momentum relationship – the impulse applied to an object is equal to the resulting change in momentum.
Analyze a force vs. time graph; compare the area under the graph to a calculated change in momentum.
Analyze real world examples including the use of airbags in cars, time of contact and “follow-through” in throwing, catching, kicking, and hitting objects in sports, and bending your knees when you jump from a height to the ground to prevent injury.
Key Vocabulary:
Key Vocabulary:
- Momentum
- Mass
- Velocity
Essential Question: What is momentum and how does it relate to force?
Essential Question: What is momentum and how does it relate to force?
Suggested Reading:
Suggested Reading:
Lesson:
Lesson:
Momentum: the product of an objects mass and velocity.
Momentum: the product of an objects mass and velocity.
AKA: An object that has a mass and is moving or inertia in motion.
AKA: An object that has a mass and is moving or inertia in motion.
Momentum is dependent upon mass and velocity:
Momentum is dependent upon mass and velocity:
p = momentum
p = momentum
Units: kg m/s
Units: kg m/s
m = mass
m = mass
Units: kg
Units: kg
v = velocity
v = velocity
Units: m/s
Units: m/s
- Velocity is a vector, therefore Momentum is also a vector.
- A change in velocity causes a change in momentum.
Examples:
Examples:
Ayden rolls down a freshly mowed grassy hill with a velocity of 10 m/s, what is Ayden's momentum?
Ayden rolls down a freshly mowed grassy hill with a velocity of 10 m/s, what is Ayden's momentum?
Brayden and Connor are inside those human soccer ball blow up toys. Brayden runs full speed at 8 m/s towards Conner who is at rest. What momentum will Brayden hit Connor with?
Brayden and Connor are inside those human soccer ball blow up toys. Brayden runs full speed at 8 m/s towards Conner who is at rest. What momentum will Brayden hit Connor with?
Amanda is walking to class with a momentum of 20 kg m/s, how fast is Amanda traveling?
Amanda is walking to class with a momentum of 20 kg m/s, how fast is Amanda traveling?
Impulse: The force that causes a change in momentum.
Impulse: The force that causes a change in momentum.
Example: If you were irresponsible and chose not to wear your seatbelt got in a car crash going 75 mph or 33.528 m/s flew through the windshield and hit the pavement in 5 seconds, what force did you hit the pavement?
Example: If you were irresponsible and chose not to wear your seatbelt got in a car crash going 75 mph or 33.528 m/s flew through the windshield and hit the pavement in 5 seconds, what force did you hit the pavement?
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