NEWish Amazing Unit 3 flashcardziz

Front

What happens to a car's force when it collides with a brick wall compared to a haystack?

Back

The car experiences a bigger force when colliding with a brick wall.

Front

When is momentum not conserved?

Back

Momentum is not conserved when there is an outside force like gravity or friction.

Front

Why are airbags considered a good safety feature in cars?

Back

Airbags decrease the force and increase the time of the crash, which helps to reduce injury.

Front

What is the reason an egg does not break when thrown at a sheet but does break when thrown at the ground?

Back

The egg does not have a bigger impulse or change in momentum; it is the time of impact that differs.

Front

What is the total momentum when two cars of the same mass and speed collide head-on?

Back

The total momentum will be zero.

Front

Define impulse in physics.

Back

Impulse is the change in momentum of an object when a force is applied over a period of time.

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's second law, force equals mass times acceleration (F = ma).

Front

Explain the concept of conservation of momentum.

Back

The total momentum of a closed system remains constant if no external forces act on it.

Front

What is the formula for calculating momentum?

Back

Momentum (p) is calculated as the product of mass (m) and velocity (v): p = mv.

Front

How does increasing the time of a collision affect the force experienced?

Back

Increasing the time of a collision decreases the force experienced, as force is the rate of change of momentum.