Physics: Momentum and Computation

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Questions and Answers

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?

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?

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?

It increases Signup and view all the answers

A car and a ball are moving at the same velocity. Which one has greater momentum?

The car, because it has greater mass Signup and view all the answers

Two objects are moving at different velocities. Which one has greater momentum?

The one with greater mass and smaller velocity Signup and view all the answers

What is the relationship between an object's momentum and its ability to stop?

The more momentum, the harder to stop Signup and view all the answers

Two cars have the same mass and are moving at different velocities. Which one has greater momentum?

The one moving at a faster velocity Signup and view all the answers

What is the momentum of a massive object at rest?

It has no momentum Signup and view all the answers

What is the formula to calculate momentum?

p = m × v Signup and view all the answers

Which of the following has a greater momentum?

A truck with a mass of 5000 kg moving at 10 m/s Signup and view all the answers

What is the SI unit of momentum?

kg·m/s Signup and view all the answers

Why does the elephant have a greater momentum than the cheetah?

Because the elephant has a greater mass Signup and view all the answers

What is the momentum of a 20,000 kg truck moving at 30,000 m/s?

600,000,000 kg·m/s Signup and view all the answers

What is the main difference between the momentum of car A and car B?

Car A has a greater momentum Signup and view all the answers

What does the term 'momentum' mean in a sports context?

A team's ability to keep moving and scoring Signup and view all the answers

What is the formula to calculate the momentum of an object?

p = mv Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

What is the total momentum of a system of objects?

The sum of the momentum of all the individual objects Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

A delivery truck is heading west with a momentum of 68,150 kg.m/s W. What is its mass?

6,815 kg Signup and view all the answers

A driver unloaded 15 cavans of rice from a truck. If the truck maintains the same speed, what happens to its momentum?

It decreases Signup and view all the answers

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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Description

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.