Uniformly Accelerated Linear Motion Model: Momentum

Physics 1: Section 3.5

If an object is approaching you, which of the following means it has a greater momentum and is more concerning?

More massive

Moving faster

Mass and momentum:

More mass → more momentum → harder to stop

Velocity (speed) and momentum:

More speed → more momentum → harder to stop

Velocity (direction) and momentum:

Opposite directions → opposite momentum → opposite outcomes

What is momentum?

Product of mass and velocity

What is the symbol and SI unit of momentum?

p_x and kilogram x meter per second (kg x m/s)

Which has the following correctly defined SI unit of momentum, which is defined as:

kg x m /s

What is a net impulse?

Product of net force and elapsed time

What is the equation for net impulse?

I_{net, x} = F_{net, x} Δt where F_{net, x} = net force in x direction

What is the symbol and SI unit for net impulse?

I_{net, x} and newton x second (N x s)

If the net force is positive, the net impulse is?

Positive

If the net force is negative, the net impulse is?

Negative

If the net force is zero, the net impulse is?

Zero