Physics Unit test - collision

What are the different vector quantities?

Acceleration, momentum, force

what is the unit of impulse

kilogram meter per second

what does the sign of the area under a force-time graph indicate?

Impulse direction

The area under a force time graph represents

impulse

In car crashes, airbags increase the time over which forces react, reducing potential for:

injury

Impulse is represented by the change in:

Momentum

What is the unit of momentum?

Kilogram meter per second

Momentum is a:

vector quantity

Momentum is defined as the product of:

Mass and velocity

what does the quantity of motion “p” denote?

Momentum

How did newton describe the relationship between forces, mass, and velocity?

force equals the change in momentum over time

According to Newtons second law, forces are:

Vectors with both magntitude and direction

What does Newtons second law state?

Net force is equal to mass multiplied by acceleration

What allows the law of conservation of momentum to be applied to problems with unknown or complex forces?

Action Reaction pairs

How does the conservation of momentum apply to a system of multiple objects?

Total initial momentum equals total final momentum

Why is it important to consider momentum as a vector during calculations?

Momentum is inherently a vector

How does the law of conservation of momentum affect momentum exchange between two colliding objects?

Momentum is transferred

How does the law of conservation of momentum apply a collision of two objects with complex forces?

Forces are irrelevant according to the 3rd law

How are forces described during interactions according to newtons third law

Equal and opposite

What does the law of conservation of momentum state?

Total initial momentum equals total final momentum

Why is momentum conserved during interactions between objects?

Action-reaction forces

According to the impluse-momentum theorem, what does impulse equal?

Force multiplied by time

What is the key difference between energy and momentum

Energy is scalar, momentum is vector

What does the impulse-momentum theorem describe?

Change in momentum

What is the basic principle behind Newton’s third law?

Action-reaction forces

Who proposed the concept of momentum?

Newton

In which direction does an object have positive momentum?

Positive direction

Momentum is a….

Vector quantity

What type of collisions can be advantageously approximated as Elastic for problem solving purposes?

Both perfectly elastic and nearly elastic collisions

In solving the collision problem with two objects (a and b), what equation is used besides the conservation of momentum?

Conservation of energy

When do we suggest using the assumption of elasticity in problem solving?

Only when explicitly stated in the problem

In the context of collisions, what does “elastic” mean?

Change in energy is equal to zero

What term is used to describe collisions where the change in energy is not equal to zero?

Inelastic

What is the reason for behavior observed in Newton’s Cradle?

Both conservation of Momentum and Energy

Newtons Cradle is constructed using what material for the spheres?

Steel

What is the primary demonstration tool mentioned for the law of conservation of momentum?

Newtons cradle

Why is momentum considered a vector quantity?

Because it has magnitude and direction

In the law of conservation and momentum, the total initial momentum of a system is equal to what?

The total final momentum