Amazing Unit 3 flashcardziz

Front

What is impulse in physics?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time. It is calculated as the product of the average force and the time duration over which the force acts.

Front

How is momentum defined?

Back

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

Front

What happens to momentum in a closed system during a collision?

Back

In a closed system, the total momentum before the collision is equal to the total momentum after the collision, according to the law of conservation of momentum.

Front

What is the relationship between impulse and momentum?

Back

Impulse is equal to the change in momentum of an object. Mathematically, Impulse = Change in Momentum = Final Momentum - Initial Momentum.

Front

What factors affect the impulse experienced by an object?

Back

Impulse is affected by the magnitude of the force applied and the duration of time the force is applied.

Front

Why do airbags reduce injury during a car crash?

Back

Airbags increase the time over which the car comes to a stop, thereby reducing the force experienced by the occupants and decreasing the impulse.

Front

What is the formula for calculating impulse?

Back

Impulse (J) = Force (F) × Time (t).

Front

If two objects collide and stick together, what can be said about their total momentum?

Back

The total momentum before the collision is equal to the total momentum after the collision, even though they move together as one object after the collision.

Front

What is the significance of a zero total momentum in a collision?

Back

A zero total momentum indicates that the objects involved in the collision have equal and opposite momenta, resulting in no net momentum after the collision.

Front

How does speed affect the impulse experienced by a moving vehicle?

Back

Higher speeds result in greater momentum, and thus a larger impulse when a force is applied to stop the vehicle.