Question

O

Select the best answer for the question.
17. A car with two people traveling down the road has a mass of 100 kg and a velocity of 5 m/s. The car pulls over and picks up two people. The mass of the car is
now 150 kg. What's the new momentum if the velocity stays the same?
O A. 1,250 kg-m/s
O B. 500 kg-m/s
C. 250 kg-m/s
O D. 750 kg-m/s
Mark for review (Will be highlighted on the review page)
DELL
O
Sign out
ES
Sep 6
8:48 US

Answer 1

The correct answer is:

D. 750 kg-m/s

Step-by-step explanation:

The law of conservation of momentum states that the total momentum of a closed system remains constant unless acted upon by an external force. In this scenario, the car and its occupants can be considered a closed system.

Initially, the car with two people has a mass of 100 kg and a velocity of 5 m/s. So, the initial momentum is:

Initial Momentum = Mass x Velocity

Initial Momentum = 100 kg x 5 m/s = 500 kg-m/s

After picking up two more people, the total mass of the car becomes 150 kg. However, the velocity stays the same at 5 m/s. So, the new momentum is:

New Momentum = Mass x Velocity

New Momentum = 150 kg x 5 m/s = 750 kg-m/s

So, the new momentum of the car is 750 kg-m/s.

The correct answer is:

O D. 750 kg-m/s