Impulse Momentum Theorem and Collisions

Cart A is pulled with a 2 Newton force for 2 seconds, and Cart B is pulled with a 1 Newton force for 3 seconds. Which cart experiences the greatest change in momentum? NOTE: This is NOT A COLLISION!

• Cart B

• Cart A

• they are the same

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A constant force of 4.5 N acts on a 7.2-kg object for 10.0 s. What is the change in the object's change in momentum? (Reminder Impulse is Equal to Change in Momentum. And Impulse = Force * Time)

• 32.4 kg*m/s

• 45.0 kg*m/s

• 72.0 kg*m/s

• 16 kg*m/s

Tags

NGSS.HS-PS2-1

The law of conservation of momentum states that, 

• The total momentum before a collision is less than the total momentum after a collision.

• The total momentum before a collision is the equal to the the total momentum after a collision.

• The total momentum before a collision is greater than the the total momentum after a collision.

Tags

NGSS.HS-PS2-2

The impulse-momentum theorem states that

• the impulse on an object is equal to the change in momentum it causes 
• the force on a moving object is equal to the magnitude of the impulse.
• the impulse on an object is greater than the change in momentum it causes 
• the impulse on an object is less than the change in momentum it causes

Tags

NGSS.HS-PS2-2

A bug flies into the windshield of a car going the opposite way. Which of the following are true?

• the force of impact is the same for both
• the impulse is the same for both
• the change in velocity of the bug is larger than the truck

• A, B, and C are all true

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

In a physics demonstration, two teams of equal-mass students are placed on each of two identical carts. A student on Cart A pushes upon Cart B. Which of the following statements describes the resulting motion of the two carts?

• Cart A will remain stationary; cart B will be propelled rightward.

• Cart A will move backwards slightly; cart B will be propelled rightward with a considerably greater speed.

• Cart B will move forward slightly; cart A will be propelled leftward with a considerably greater speed.

• Cart A and Cart B will move away from each other with the same speed.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

In a physics demonstration, two teams of equal-mass students are placed on each of two identical carts. A student on Cart A pushes upon Cart B. Which of the following statements describes the force of impact acting on each of the two carts?

• Both carts experience the same force.

• Cart A will experience a greater force than Cart B.

• Cart B will experience a greater force than Cart A.

• Cart A experiences no force, only Cart B does.

Tags

NGSS.HS-PS2-1

A small fish is at rest in the water. A big fish with four times the mass is gliding along with a speed of 20 cm/s. The big fish opens its mouth and captures the smaller fish. With what speed do the two fish glide through the water after the collision?

• With a slower speed - perhaps 16 cm/s.

• With a faster speed - perhaps 25 cm/s.

• The same speed - 20 cm/s.

• It is impossible to predict with so little information.

Tags

NGSS.HS-PS2-2

Car A has a mass of 4-kg and Car B of unknown mass travel toward each other. An elastic collision occurs in which momentum is conserved. The graph above shows the velocity of Car A and of velocity of Car B as a function of time before, during, and after the collision. What is the mass of the Car B?

• Car B has a mass greater than Car A, because it experiences a greater change in velocity.

• Car B has a mass greater than Car A, because it experiences a smaller change in velocity.

• Car B has a mass less than Car A, because it experiences a greater change in velocity.

• Car B has a mass less than Car A, because it experiences a smaller change in velocity.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

Car A has a mass of 2-kg and Car B of unknown mass travel toward each other. An elastic collision occurs in which momentum is conserved. The graph above shows the velocity of Car A and of velocity of Car B as a function of time before, during, and after the collision. What is the mass of the Car B?

• Car B has a mass greater than Car A, because it experiences a greater change in velocity.

• Car B has a mass greater than Car A, because it experiences a smaller change in velocity.

• Car B has a mass less than Car A, because it experiences a greater change in velocity.

• Car B has a mass less than Car A, because it experiences a smaller change in velocity.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2