24 Questions
What is the momentum of an object dependent on?
Both its mass and velocity
Which object has greater momentum if both are moving at the same velocity?
The object with greater mass
What is the momentum of an object at rest?
It is zero
What happens to the momentum of an object when its velocity increases?
It increases
A car and a ball are moving at the same velocity. Which one has greater momentum?
The car, because it has greater mass
Two objects are moving at different velocities. Which one has greater momentum?
The one with greater mass and smaller velocity
What is the relationship between an object's momentum and its ability to stop?
The more momentum, the harder to stop
Two cars have the same mass and are moving at different velocities. Which one has greater momentum?
The one moving at a faster velocity
What is the momentum of a massive object at rest?
It has no momentum
What is the formula to calculate momentum?
p = m × v
Which of the following has a greater momentum?
A truck with a mass of 5000 kg moving at 10 m/s
What is the SI unit of momentum?
kg·m/s
Why does the elephant have a greater momentum than the cheetah?
Because the elephant has a greater mass
What is the momentum of a 20,000 kg truck moving at 30,000 m/s?
600,000,000 kg·m/s
What is the main difference between the momentum of car A and car B?
Car A has a greater momentum
What does the term 'momentum' mean in a sports context?
A team's ability to keep moving and scoring
What is the formula to calculate the momentum of an object?
p = mv
A truck is moving at 10 m/s with a total mass of 6,815 kg. What is its momentum?
68,150 kg.m/s W
A 12 kg object has a momentum of 20 kg-m/s towards the east direction. How fast is the object moving?
1.67 m/s
What is the total momentum of a system of objects?
The sum of the momentum of all the individual objects
A bird is flying at 15 m/s with a momentum of 0.27 kg-m/s. What is its mass?
0.018 kg or 0.02 kg
A golf ball travels at 16 m/s while a baseball moves at 7 m/s. Which one has a higher momentum?
Cannot be determined without mass
A delivery truck is heading west with a momentum of 68,150 kg.m/s W. What is its mass?
6,815 kg
A driver unloaded 15 cavans of rice from a truck. If the truck maintains the same speed, what happens to its momentum?
It decreases
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.
Learn about the concept of momentum, how to compute it, and which object has greater momentum when moving at the same velocity. Understand the definition of momentum as a product of mass and velocity.
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