Conservation of Momentum in Collisions

The video tutorial explains the concept of momentum conservation, starting with the basic equations for calculating momentum and changes in momentum. It introduces Newton's Third Law and its application in momentum conservation, particularly in collisions. The tutorial provides examples involving trolleys to illustrate how momentum is conserved in different scenarios, including stationary and moving trolleys, trolleys moving in the same direction, and trolleys moving towards each other.

What is the formula for calculating the momentum of an object?

• Mass multiplied by velocity

• Mass divided by velocity

• Force divided by time

• Velocity divided by mass

According to Newton's Third Law, what is true about the forces between two interacting objects?

• They are unequal in magnitude but equal in direction

• They are equal in magnitude but opposite in direction

• They are unequal in both magnitude and direction

• They are equal in magnitude and direction

In a collision, what does the conservation of momentum principle state?

• Total momentum is not conserved in a collision

• Total momentum before the collision is equal to the total momentum after

• Total momentum before the collision is less than after

• Total momentum before the collision is greater than after

If a 1 kg trolley moving at 1.5 m/s collides with a stationary 1.5 kg trolley, what is the velocity of the combined trolleys after the collision?

• 0.6 m/s

• 1.5 m/s

• 1.0 m/s

• 2.0 m/s

What is the combined mass of two trolleys, one with a mass of 2 kg and the other with a mass of 4 kg?

• 6 kg

• 4 kg

• 2 kg

• 8 kg

In the example where two trolleys move towards each other, what is the initial momentum of the red trolley moving at 3 m/s with a mass of 2 kg?

• 3 kg m/s

• 6 kg m/s

• 9 kg m/s

• 12 kg m/s

After two trolleys moving towards each other collide and combine, what is their velocity if their combined mass is 3 kg and the total momentum is 3 kg m/s?

• 1.5 m/s

• 1.0 m/s

• 2.0 m/s

• 0.5 m/s