Question

How can you calculate whether momentum was conserved before and after a collision?(1 point)
Responses

Take the sum of the momentums of both objects before the collision, then take the sum of the momentums of both objects after the collision. If these values are not equal, then momentum has been conserved.
Take the sum of the momentums of both objects before the collision, then take the sum of the momentums of both objects after the collision. If these values are not equal, then momentum has been conserved.

Take the sum of the momentums of both objects before the collision, then add them to the momentums of both objects after the collision.
Take the sum of the momentums of both objects before the collision, then add them to the momentums of both objects after the collision.

Take the sum of the momentums of both objects before the collision, then subtract them from the momentums of both objects after the collision.
Take the sum of the momentums of both objects before the collision, then subtract them from the momentums of both objects after the collision.

Take the sum of the momentums of both objects before the collision, then take the sum of the momentums of both objects after the collision. If these values are equal, then momentum has been conserved.
Take the sum of the momentums of both objects before the collision, then take the sum of the momentums of both objects after the collision. If these values are equal, then momentum has been conserved.
Question 2
Choose the correct two pieces of data to calculate the momentum of an object.(1 point)
Responses

The mass of the object and its acceleration
The mass of the object and its acceleration

The mass of the object and its velocity
The mass of the object and its velocity

The size of the object and its velocity
The size of the object and its velocity

The velocity of an object and the direction it is moving in.
The velocity of an object and the direction it is moving in.
Question 3
Which choice below is the best to describe why it is actually impossible to demonstrate conservation in real life, here on Earth.(1 point)
Responses

Internal forces in the objects absorb the total momentum of the object.
Internal forces in the objects absorb the total momentum of the object.

The wind increases the momentum and decreases the friction.
The wind increases the momentum and decreases the friction.

Real-life situations include some amount of external forces like friction, so the systems are not completely closed.
Real-life situations include some amount of external forces like friction, so the systems are not completely closed.

Determining the direction of travel is impossible.
Determining the direction of travel is impossible.
Question 4
Calculate the momentum of a toy car with a mass of 0.33 kg, traveling 1.23 meters in 3.2 seconds. Round to the nearest hundredth.(1 point)
Responses

0.13 kg.m/s
0.13 kg.m/s

0.86 kg.m/s
0.86 kg.m/s

1.06 kg.m/s
1.06 kg.m/s

0.41 kg.m/s

Answer 1

Here are the correct answers to the questions based on the principles of physics:

**Question 1:** How can you calculate whether momentum was conserved before and after a collision?
**Response:** Take the sum of the momentums of both objects before the collision, then take the sum of the momentums of both objects after the collision. If these values are equal, then momentum has been conserved.

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**Question 2:** Choose the correct two pieces of data to calculate the momentum of an object.
**Response:** The mass of the object and its velocity.

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**Question 3:** Which choice below is the best to describe why it is actually impossible to demonstrate conservation in real life, here on Earth?
**Response:** Real-life situations include some amount of external forces like friction, so the systems are not completely closed.

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**Question 4:** Calculate the momentum of a toy car with a mass of 0.33 kg, traveling 1.23 meters in 3.2 seconds. Round to the nearest hundredth.
To calculate the momentum, you first need to determine the velocity of the toy car.

Velocity (v) = distance / time = 1.23 m / 3.2 s = 0.384375 m/s.

Now, calculate the momentum (p = mass × velocity):
p = 0.33 kg × 0.384375 m/s = 0.126066 kg·m/s.

Rounding to the nearest hundredth gives 0.13 kg·m/s.

**Response:** 0.13 kg.m/s.