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Questions and Answers
What is the momentum of an object dependent on?
What is the momentum of an object dependent on?
- Both its mass and velocity (correct)
- Only its velocity
- Only its mass
- Neither its mass nor velocity
Which object has greater momentum if both are moving at the same velocity?
Which object has greater momentum if both are moving at the same velocity?
- Both objects have the same momentum
- The object with smaller mass
- It cannot be determined
- The object with greater mass (correct)
What is the momentum of an object at rest?
What is the momentum of an object at rest?
- It depends on its velocity
- It depends on its mass
- It is infinite
- It is zero (correct)
What happens to the momentum of an object when its velocity increases?
What happens to the momentum of an object when its velocity increases?
A car and a ball are moving at the same velocity. Which one has greater momentum?
A car and a ball are moving at the same velocity. Which one has greater momentum?
Two objects are moving at different velocities. Which one has greater momentum?
Two objects are moving at different velocities. Which one has greater momentum?
What is the relationship between an object's momentum and its ability to stop?
What is the relationship between an object's momentum and its ability to stop?
Two cars have the same mass and are moving at different velocities. Which one has greater momentum?
Two cars have the same mass and are moving at different velocities. Which one has greater momentum?
What is the momentum of a massive object at rest?
What is the momentum of a massive object at rest?
What is the formula to calculate momentum?
What is the formula to calculate momentum?
Which of the following has a greater momentum?
Which of the following has a greater momentum?
What is the SI unit of momentum?
What is the SI unit of momentum?
Why does the elephant have a greater momentum than the cheetah?
Why does the elephant have a greater momentum than the cheetah?
What is the momentum of a 20,000 kg truck moving at 30,000 m/s?
What is the momentum of a 20,000 kg truck moving at 30,000 m/s?
What is the main difference between the momentum of car A and car B?
What is the main difference between the momentum of car A and car B?
What does the term 'momentum' mean in a sports context?
What does the term 'momentum' mean in a sports context?
What is the formula to calculate the momentum of an object?
What is the formula to calculate the momentum of an object?
A truck is moving at 10 m/s with a total mass of 6,815 kg. What is its momentum?
A truck is moving at 10 m/s with a total mass of 6,815 kg. What is its momentum?
A 12 kg object has a momentum of 20 kg-m/s towards the east direction. How fast is the object moving?
A 12 kg object has a momentum of 20 kg-m/s towards the east direction. How fast is the object moving?
What is the total momentum of a system of objects?
What is the total momentum of a system of objects?
A bird is flying at 15 m/s with a momentum of 0.27 kg-m/s. What is its mass?
A bird is flying at 15 m/s with a momentum of 0.27 kg-m/s. What is its mass?
A golf ball travels at 16 m/s while a baseball moves at 7 m/s. Which one has a higher momentum?
A golf ball travels at 16 m/s while a baseball moves at 7 m/s. Which one has a higher momentum?
A delivery truck is heading west with a momentum of 68,150 kg.m/s W. What is its mass?
A delivery truck is heading west with a momentum of 68,150 kg.m/s W. What is its mass?
A driver unloaded 15 cavans of rice from a truck. If the truck maintains the same speed, what happens to its momentum?
A driver unloaded 15 cavans of rice from a truck. If the truck maintains the same speed, what happens to its momentum?
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Study Notes
Momentum
- Momentum is defined as "mass in motion" or the amount of motion an object has.
- It is the product of an object's mass and velocity.
- Momentum is a vector quantity that depends on two variables: the mass of an object and its velocity.
- The more massive an object is, the more momentum it will have.
- The faster an object is moving, the more momentum it will have.
- A heavier object will have more momentum than a lighter object moving at the same velocity.
Factors Affecting Momentum
- Mass: the more massive an object is, the more momentum it will have.
- Velocity: the faster an object is moving, the more momentum it will have.
Calculating Momentum
- The formula to calculate momentum is: p = mv (momentum = mass x velocity)
- The SI unit for momentum is kg.m/s.
Examples of Momentum
- A car has more momentum than a baseball moving at the same velocity due to its greater mass.
- An object at rest has no momentum, regardless of its mass.
- A team that is "on the move" and "hard to stop" is said to have momentum.
Comparing Momentum
- If two objects are moving at the same velocity, the heavier object will have more momentum.
- If two objects have the same mass, the one moving at a faster velocity will have more momentum.
Practice Problems
Delivery Trucks
- A delivery truck with a mass of 20,000 kg moving at 30,000 m/s has greater momentum than a truck with a mass of 10,000 kg moving at the same velocity.
Cheetah and Elephant
- An elephant running at 5 m/s has more momentum than a cheetah running at 31 m/s due to its greater mass.
Delivery Truck with Cavans of Rice
- The momentum of a delivery truck carrying cavans of rice can be calculated by finding the total mass of the truck, driver, and rice, and multiplying it by the velocity.
Unloading Cavans of Rice
- If the truck unloads some of the cavans of rice, its momentum will decrease.
Object Moving East
- An object with a momentum of 20 kg-m/s moving east can be calculated to be moving at a velocity of 1.67 m/s.
Bird Flying
- A bird flying at 15 m/s with a momentum of 0.27 kg-m/s has a mass of approximately 0.02 kg.
Golf Ball and Baseball
- A golf ball moving at 16 m/s has more momentum than a baseball moving at 7 m/s.
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