Momentum Elastic and Inelastic

A 1500 kg car traveling at 15.0 m/s to the right collides with a 4500 kg truck that is initially at rest at a stoplight. The car and truck stick together and move together after the collision. What is the final velocity of the two-vehicle mass? m₁v₁+m₂v₂=(m₁+m₂)v_f

• 10 m/s

• 3.75 m/s

• 5 m/s

• 2 m/s

Tags

NGSS.HS-PS2-2

What makes it possible to determine the motion of objects before or after colliding?

• Conservation of Energy
• Conservation of Strength
• Conservation of Momentum
• Conservation of Homework

Tags

NGSS.HS-PS2-2

A 10 kg donut sliding to the right at 12 m/s on a frictionless surface makes a head-on collision with a 24 kg bagel moving to the left at -18.0 m/s. After the collision, the first marble moves to the left at -22.5 m/s. What is the velocity of the second marble? m₁v₁+m₂v₂=m₁v₁^'+m₂v₂^'

• 22.5 m/s

• -32 m/s

• -3.625 m/s

• -4.825 m/s

Tags

NGSS.HS-PS2-2

The total momentum before a collision is _________ the total momentum after a collision. (conservation of momentum)

• equal to 
• less than 
• more than
• It depends on the type of collision

Tags

NGSS.HS-PS2-2

What is the the total momentum of the red and blue ball before the collision? m₁v₁+m₂v₂=(m₁+m₂)v_f

• 16 kg m/s

• 32 kg m/s

• 2 kg m/s

• 6 kg m/s

Tags

NGSS.HS-PS2-2

A grocery shopper tosses a 9.0 kg bag of rice into a stationary 18.0 kg grocery cart. The bag hits the cart with a horizontal speed of 5.5 m/s toward the front of the cart. What is the final velocity of the cart and bag? m₁v₁+m₂v₂=(m₁+m₂)v_f

• 1.83 m/s

• 5.5 m/s

• 2.5 m/s

• 15 m/s

Tags

NGSS.HS-PS2-2

When is momentum conserved in a collision?

• When the collision is inelastic.
• When the collision is elastic.
• When the collision is inelastic OR elastic but never an explosion.
• All collisions.

Tags

NGSS.HS-PS2-2

The momentum of an object depends upon the object's ___________&_____________.

• size and shape

• mass and speed

• mass and veloctiy

• mass and energy

Tags

NGSS.HS-PS2-2

If two objects have the same mass, then the faster moving object has ____________ momentum.

• more 
• less
• the same

Tags

NGSS.HS-PS2-2

Jorge noticed a collision outside the coffee shop where two cars collided and stuck together. What type of collision did he observe?

• Elastic

• Inelastic

• none

Tags

NGSS.HS-PS2-2