Momentum, Impulse, Collisions Review

What is momentum?

• The quantity of motion posessed by a system due to its mass and velocity

• The rate at which a system is displaced from its equilibrium position over time

• The vector sum of the forces acting on a system

• The rate at which the velocity of a system changes over time

Tags

NGSS.HS-PS2-2

What is the formula for calculating the momentum of a particle?

Tags

NGSS.HS-PS2-2

Match the following

• Momentum

• Mass

• Velocity

Tags

NGSS.HS-PS2-2

At the start of its motion, an object is traveling upwards with a velocity of +15 m/s. It goes on to experience a net of acceleration of -9.8 m/s/s. What is the direction of the object's momentum at the start of its motion? Implement a coordinate system in which upwards is the positive direction vertically and rightwards is the positive direction horizontally.

• Upwards because the direction of the momentum vector depends on the direction of the velocity vector

• Upwards because the direction of the momentum vector depends on the direction of the acceleration vector

• Downwards because the direction of the momentum vector depends on the direction of the velocity vector

• Downwards because the direction of the momentum vector depends on the direction of the acceleration vector

Tags

NGSS.HS-PS2-2

Consider two objects called A and B. Object A has a mass of 15 kg and a horizontal velocity of +7.6 m/s. Object B has a mass of 12 kg and a horizontal velocity of +7.6 m/s. How do the momenta of the two objects compare to each other? Implement a coordinate system in which rightwards is the positive direction.

• Objects A and B have the exact same momentum

• Objects A and B have momenta that are the same in magnitude but opposite in direction

• Object A has more momentum than Object B because Object A has more mass

• Object A has more momentum than Object B because Object A has a greater velocity

• Object B has more momentum than Object A because Object B has less mass

Tags

NGSS.HS-PS2-2

Consider two objects called A and B. Object A has a mass of 15 kg and a horizontal velocity of +7.6 m/s. Object B has a mass of 15 kg and a horizontal velocity of +18.3 m/s. How do the momenta of the two objects compare to each other? Implement a coordinate system in which rightwards is the positive direction.

• Objects A and B have the exact same momentum

• Objects A and B have momenta that are the same in magnitude but opposite in direction

• Object A has more momentum than Object B because Object A has more mass

• Object B has more momentum than Object A because Object B has a greater velocity

• Object B has more momentum than Object A because Object B has less mass

Tags

NGSS.HS-PS2-2

What are internal forces?

• Forces that come from within yourself

• The forces that occur within a system of particles

• The forces that occur from outside the system

• The forces that conserve the mechanical energy of a system

What are external forces?

• Forces that come from within yourself

• The forces that occur within a system of particles

• The forces that occur from outside the system

• The forces that conserve the mechanical energy of a system

Tags

NGSS.HS-PS2-4

Consider a system made up of two objects: Objects A and B. The objects are only moving along a single axis. If Object A has a momentum of 16 kg · m/s, Object B has a momentum of 28 kg · m/s, then what is the total momentum of the system?

• 16 kg · m/s

• 28 kg · m/s

• 12 kg · m/s

• 44 kg · m/s

Tags

NGSS.HS-PS2-2

If an isolated system of two particles has a total momentum of 37 kg · m/s and the two particles undergo an elastic collision, what is the total momentum of the isolated system after the elastic collision? Note: The two particles each have a mass of 5 kg.

• 37 kg · m/s

• 42 kg · m/s

• 5 kg · m/s

• 32 kg · m/s

Tags

NGSS.HS-PS2-2