Answer:
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