Review Before Flashcard 7

Front

What is net force?

Back

Net force is the overall force acting on an object when all the individual forces acting on it are combined. It determines the object's acceleration.

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity. It is a vector quantity, meaning it has both magnitude and direction.

Front

How does mass affect momentum?

Back

The greater the mass of an object, the greater its momentum for a given velocity. Momentum = mass x velocity.

Front

What happens to momentum when an object is stopped?

Back

When an object is stopped, its momentum changes to zero. The change in momentum is equal to the initial momentum of the object.

Front

What is the principle of conservation of momentum?

Back

The principle states that in a closed system, the total momentum before an event is equal to the total momentum after the event, provided no external forces act on it.

Front

How do you calculate change in momentum?

Back

Change in momentum is calculated by subtracting the final momentum from the initial momentum: Change in momentum = Final momentum - Initial momentum.

Front

What is the relationship between force and momentum?

Back

Force is the rate of change of momentum. According to Newton's second law, Force = Change in momentum / Time.

Front

What is the effect of velocity on momentum?

Back

An increase in velocity will increase the momentum of an object, assuming its mass remains constant.

Front

What is an example of an object with high momentum?

Back

A large truck moving at a slow speed has high momentum due to its large mass, compared to a small car moving at a high speed.

Front

What is the significance of direction in momentum?

Back

Momentum is a vector quantity, so both the magnitude and direction are important. Two objects can have the same momentum but in different directions.