Question

because momentum depends on velocity, what can you reasonably conclude about the direction of these two vectors?
they are not related, so you need more information to determine the direction.
they are the same, because momentum depends on velocity.
they are opposite (north/south, east/west, etc.)
momentum and velocity are scalars and do not have direction.
what is the momentum of a 6,000 kg truck traveling north at 30 m/s?
200 kg*m/s south
6,030 kg*m/s north
180,000 kg*m/s north
5,970 kg*m/s south
what is the momentum of a 400 kg elephant standing still and eating peanuts for 30 s?
400 kg*m/s
12,000 kg*m/s
0 kg*m/s
elephants cant have momentum

Explanation:

First Question:

Momentum \( p = mv \) (where \( m \) is mass and \( v \) is velocity). Since \( m \) (mass) is a scalar (has no direction), the direction of momentum is the same as the direction of velocity.

Using the formula \( p=mv \). Here \( m = 6000\ kg \) and \( v=30\ m/s \) (direction is north). So \( p=(6000\ kg)\times(30\ m/s)=180000\ kg\cdot m/s \) and the direction is the same as velocity (north).

If the elephant is standing still, \( v = 0\ m/s \). Using \( p = mv \), with \( m = 400\ kg \) and \( v = 0\ m/s \), then \( p=(400\ kg)\times(0\ m/s)=0\ kg\cdot m/s \)

Answer:

B. They are the same, because momentum depends on velocity.

Second Question: