NEWish 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 force and the time duration over which the force acts.

Front

How is impulse related to momentum?

Back

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

Front

What happens to impulse when a car crashes into a wall versus a haystack?

Back

The impulse experienced by the car is the same in both cases, as it depends on the change in momentum, which is constant regardless of the type of object.

Front

What is the formula for calculating impulse?

Back

Impulse (J) = Force (F) × Time (t) or J = Δp (change in momentum).

Front

What is the relationship between force, time, and impulse?

Back

Impulse is directly proportional to the force applied and the time duration over which it is applied. If time increases while impulse remains constant, force must decrease.

Front

Why does a longer crash time reduce the force experienced by a passenger?

Back

A longer crash time increases the time over which the impulse is applied, thus reducing the average force experienced by the passenger according to the impulse-momentum theorem.

Front

What is the effect of a negative impulse on an object's momentum?

Back

A negative impulse decreases the momentum of an object, meaning it will slow down.

Front

How does an airbag reduce injury during a car crash?

Back

An airbag increases the time of the crash, which reduces the force experienced by the passenger, thereby decreasing the risk of injury.

Front

What is the difference between impulse and force?

Back

Impulse is a measure of the change in momentum, while force is the rate at which momentum changes. Impulse is the product of force and time.

Front

If a car experiences an impulse of -100 kgm/s, what happens to its velocity?

Back

If the car initially travels at 10 m/s and experiences a negative impulse, it will lose momentum and end up moving slower.