Asked by Jon

9)Which has more momentum? A .1 kg toy truck moving at 1012 m/s or a real 2200 kg truck moving at .046 m/s?

The real truck since it has more mass

10)A 120 kg football player tries to dive into the endzone at 7.5 m/s to score a touchdown. A 150 kg player dives out of the endzone into the other player at 5 m/s to try and stop him. They collide at the goalline and the tackler holds on to the player diving into the endzone. Does the player score a touchdown or not?

I'm gonna go with yes
Answered by drwls
Momentum is M*V. Are you aware of that? Have you done the numbers?

The toy truck's momentum is 101.2 kg m/s

The real truck's momentum is 101.2 kg m/s

They are the same.

As for the football question, explain why you chose "touchdown".
Answered by Jon
b/c the 120 guy is going faster
Answered by Jon
yes I did the numbers how did you get:
The toy truck's momentum is 101.2 kg m/s

The real truck's momentum is 101.2 kg m/s
Answered by drwls
The MOMENTUM of the runner, 120*7.5 = 900 kg m/s, exceeds the momentum of the tsacker in the opposite direction, 50*150 = 750 kg m/s
The net momentum will carry then forward when they are "stuck" together at the goal line.
Answered by drwls
Momentum is M V. I multiplied M times V.
Answered by drwls
tsacker = tackler
Answered by Jon
so they both stop exactly at the goalline or he scores? from what you said he scores
Answered by Jon
I did the wrong numbers. I changed it to Newtons
Answered by drwls
I said "The net momentum will carry then forward when they are "stuck" together at the goal line."

Forward means across the goal line. Yes, it's a touchdown.
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