conservation of momentum

In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other.  The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s.  The carts stick together when they collide.  what kind of collision is this?

• apart --> together

• together -->apart

• apart --> apart

• no clue

Two football players with mass 75 kg and 100 kg run directly toward each other with speeds of 6 m/s and 8 m/s respectively. If they grab each other as they collide, the combined speed of the two players just after the collision would be:

• 2 m/s 
• 3.4 m/s 
• 4.6 m/s 
• 7.1 m/s

The total momentum before a collision is _________ the total momentum after a collision.

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

A 0.030 kg bullet is fired from a gun with a speed of 350 m/s. If the gun has a mass of 0.9 kg, What kind of collision is this?

• together --> apart

• apart --> together

• apart --> apart

• no clue

A 9 kg blob moving at 5 m/s collides and sticks to a second blob with a mass of 5 kg. If the two bobs stick together, what will the velocity of the two blobs move at?

• 3.57 m/s
• 3.2 m/s
• 10.0  m/s
• 9.0  m/s

A big fish swims upon and swallows a small fish at rest. After lunch, the big fish has less

• momentum
• velocity
• mass

The momentum of an object is the sum of its mass and its velocity.

• True

• False

A real car moving at 10 km/h has more momentum than a toy car moving at the same rate because ______.

• its mass is greater

• its mass is less

• it moves faster

• of friction

If an object with a mass of 12 kilograms is moving at 10 meters per second, what is its momentum?

• 120 kg*m/s

• 120 kg*m*s

• 1.2 kg*m/s

• 1.2 kg*m*s

If each object is moving at the same velocity which will have the least momentum?

• Baseball

• Bowling Ball

• Golf Ball

• Tennis Ball