Momentum | Collision Review

T/F: Momentum is a vector quantity.

• True
• False

T/F:  Car A is 1000 kg and moving north at 25 m/s.  Car B is 1000 kg and moving west at 25 m/s.  Which car has more momentum.

• Car A because it is moving in the positive direction.
• Car B because it is moving horizontally.
• Car A and Car B have the same momentum.

T/F:  A big truck will always have more momentum than a small car.

• True
• False

T/F:  Impulse is a force.

• True
• False

T/F: Two objects that collide will have the same magnitude of impulse.

• True
• False

T/F:  During a collision, one object will gain momentum and the second object will lose the same amount of momentum gained by the first object.

• True
• False

T/F:  Conservation of momentum means that the momentum of an object before a collision is the same as the object's momentum after the collision.

• True
• False

T/F:  Conservation of momentum means that the momentum of all objects before a collision is the same as all objects' momentum after the collision.

• True
• False

An axe is used to strike a tree.  Compared with the time the axe acts on the tree...

• the tree acts for less time on the axe.
• the tree acts for more time on the axe.
• the tree acts for the same amount of time on the axe.

The purpose of crumble zones on a car is to

• decrease time of impact.
• increase force of impact.
• increase the time of impact.
• decrease the impulse during impact.